diff --git a/crates/bili_sync/src/config.rs b/crates/bili_sync/src/config.rs
deleted file mode 100644
index 4606015..0000000
--- a/crates/bili_sync/src/config.rs
+++ /dev/null
@@ -1,308 +0,0 @@
-use std::borrow::Cow;
-use std::collections::HashMap;
-use std::path::PathBuf;
-use std::sync::Arc;
-
-use anyhow::Result;
-use arc_swap::ArcSwapOption;
-use handlebars::handlebars_helper;
-use once_cell::sync::Lazy;
-use serde::de::{Deserializer, MapAccess, Visitor};
-use serde::ser::SerializeMap;
-use serde::{Deserialize, Serialize};
-
-use crate::bilibili::{CollectionItem, CollectionType, Credential, DanmakuOption, FilterOption};
-
-pub static TEMPLATE: Lazy<handlebars::Handlebars> = Lazy::new(|| {
-    let mut handlebars = handlebars::Handlebars::new();
-    handlebars_helper!(truncate: |s: String, len: usize| {
-        if s.chars().count() > len {
-            s.chars().take(len).collect::<String>()
-        } else {
-            s.to_string()
-        }
-    });
-    handlebars.register_helper("truncate", Box::new(truncate));
-    handlebars
-        .register_template_string("video", &CONFIG.video_name)
-        .unwrap();
-    handlebars.register_template_string("page", &CONFIG.page_name).unwrap();
-    handlebars
-});
-
-pub static CONFIG: Lazy<Config> = Lazy::new(|| {
-    let config = Config::load().unwrap_or_else(|err| {
-        if err
-            .downcast_ref::<std::io::Error>()
-            .map_or(true, |e| e.kind() != std::io::ErrorKind::NotFound)
-        {
-            panic!("加载配置文件失败，错误为： {err}");
-        }
-        warn!("配置文件不存在，使用默认配置...");
-        Config::default()
-    });
-    // 放到外面，确保新的配置项被保存
-    info!("配置加载完毕，覆盖刷新原有配置");
-    config.save().unwrap();
-    // 检查配置文件内容
-    info!("校验配置文件内容...");
-    config.check();
-    config
-});
-
-pub static ARGS: Lazy<Args> = Lazy::new(Args::parse);
-
-pub static CONFIG_DIR: Lazy<PathBuf> =
-    Lazy::new(|| dirs::config_dir().expect("No config path found").join("bili-sync"));
-
-#[derive(Serialize, Deserialize)]
-pub struct Config {
-    pub credential: ArcSwapOption<Credential>,
-    pub filter_option: FilterOption,
-    #[serde(default)]
-    pub danmaku_option: DanmakuOption,
-    pub favorite_list: HashMap<String, PathBuf>,
-    #[serde(
-        default,
-        serialize_with = "serialize_collection_list",
-        deserialize_with = "deserialize_collection_list"
-    )]
-    pub collection_list: HashMap<CollectionItem, PathBuf>,
-    #[serde(default)]
-    pub submission_list: HashMap<String, PathBuf>,
-    #[serde(default)]
-    pub watch_later: WatchLaterConfig,
-    pub video_name: Cow<'static, str>,
-    pub page_name: Cow<'static, str>,
-    pub interval: u64,
-    pub upper_path: PathBuf,
-    #[serde(default)]
-    pub nfo_time_type: NFOTimeType,
-    #[serde(default)]
-    pub delay: DelayConfig,
-    #[serde(default = "default_time_format")]
-    pub time_format: String,
-}
-
-fn default_time_format() -> String {
-    "%Y-%m-%d".to_string()
-}
-
-#[derive(Serialize, Deserialize, Default)]
-pub struct WatchLaterConfig {
-    pub enabled: bool,
-    pub path: PathBuf,
-}
-
-#[derive(Serialize, Deserialize, Default)]
-pub struct DelayConfig {
-    pub refresh_video_list: Option<Delay>,
-    pub fetch_video_detail: Option<Delay>,
-    pub download_video: Option<Delay>,
-    pub download_page: Option<Delay>,
-}
-
-#[derive(Serialize, Deserialize)]
-#[serde(untagged, rename_all = "lowercase")]
-pub enum Delay {
-    Random { min: u64, max: u64 },
-    Fixed(u64),
-}
-
-#[derive(Serialize, Deserialize, Default)]
-#[serde(rename_all = "lowercase")]
-pub enum NFOTimeType {
-    #[default]
-    FavTime,
-    PubTime,
-}
-
-impl Default for Config {
-    fn default() -> Self {
-        Self {
-            credential: ArcSwapOption::from(Some(Arc::new(Credential::default()))),
-            filter_option: FilterOption::default(),
-            danmaku_option: DanmakuOption::default(),
-            favorite_list: HashMap::new(),
-            collection_list: HashMap::new(),
-            submission_list: HashMap::new(),
-            watch_later: Default::default(),
-            video_name: Cow::Borrowed("{{title}}"),
-            page_name: Cow::Borrowed("{{bvid}}"),
-            interval: 1200,
-            upper_path: CONFIG_DIR.join("upper_face"),
-            nfo_time_type: NFOTimeType::FavTime,
-            delay: Default::default(),
-            time_format: default_time_format(),
-        }
-    }
-}
-
-impl Config {
-    /// 简单的预检查
-    pub fn check(&self) {
-        let mut ok = true;
-        if self.favorite_list.is_empty() && self.collection_list.is_empty() && !self.watch_later.enabled {
-            ok = false;
-            error!("没有配置任何需要扫描的内容，程序空转没有意义");
-        }
-        if self.watch_later.enabled && !self.watch_later.path.is_absolute() {
-            error!(
-                "稍后再看保存的路径应为绝对路径，检测到：{}",
-                self.watch_later.path.display()
-            );
-        }
-        for path in self.favorite_list.values() {
-            if !path.is_absolute() {
-                ok = false;
-                error!("收藏夹保存的路径应为绝对路径，检测到: {}", path.display());
-            }
-        }
-        if !self.upper_path.is_absolute() {
-            ok = false;
-            error!("up 主头像保存的路径应为绝对路径");
-        }
-        if self.video_name.is_empty() {
-            ok = false;
-            error!("未设置 video_name 模板");
-        }
-        if self.page_name.is_empty() {
-            ok = false;
-            error!("未设置 page_name 模板");
-        }
-        let credential = self.credential.load();
-        match credential.as_deref() {
-            Some(credential) => {
-                if credential.sessdata.is_empty()
-                    || credential.bili_jct.is_empty()
-                    || credential.buvid3.is_empty()
-                    || credential.dedeuserid.is_empty()
-                    || credential.ac_time_value.is_empty()
-                {
-                    ok = false;
-                    error!("Credential 信息不完整，请确保填写完整");
-                }
-            }
-            None => {
-                ok = false;
-                error!("未设置 Credential 信息");
-            }
-        }
-        for delay_config in [
-            &self.delay.refresh_video_list,
-            &self.delay.fetch_video_detail,
-            &self.delay.download_video,
-            &self.delay.download_page,
-        ]
-        .iter()
-        .filter_map(|x| x.as_ref())
-        {
-            if let Delay::Random { min, max } = delay_config {
-                if min >= max {
-                    ok = false;
-                    error!("随机延迟的最小值应小于最大值");
-                }
-            }
-        }
-        if !ok {
-            panic!(
-                "位于 {} 的配置文件不合法，请参考提示信息修复后继续运行",
-                CONFIG_DIR.join("config.toml").display()
-            );
-        }
-    }
-
-    fn load() -> Result<Self> {
-        let config_path = CONFIG_DIR.join("config.toml");
-        let config_content = std::fs::read_to_string(config_path)?;
-        Ok(toml::from_str(&config_content)?)
-    }
-
-    pub fn save(&self) -> Result<()> {
-        let config_path = CONFIG_DIR.join("config.toml");
-        std::fs::create_dir_all(&*CONFIG_DIR)?;
-        std::fs::write(config_path, toml::to_string_pretty(self)?)?;
-        Ok(())
-    }
-}
-
-fn serialize_collection_list<S>(
-    collection_list: &HashMap<CollectionItem, PathBuf>,
-    serializer: S,
-) -> Result<S::Ok, S::Error>
-where
-    S: serde::Serializer,
-{
-    let mut map = serializer.serialize_map(Some(collection_list.len()))?;
-    for (k, v) in collection_list {
-        let prefix = match k.collection_type {
-            CollectionType::Series => "series",
-            CollectionType::Season => "season",
-        };
-        map.serialize_entry(&[prefix, &k.mid, &k.sid].join(":"), v)?;
-    }
-    map.end()
-}
-
-fn deserialize_collection_list<'de, D>(deserializer: D) -> Result<HashMap<CollectionItem, PathBuf>, D::Error>
-where
-    D: Deserializer<'de>,
-{
-    struct CollectionListVisitor;
-
-    impl<'de> Visitor<'de> for CollectionListVisitor {
-        type Value = HashMap<CollectionItem, PathBuf>;
-
-        fn expecting(&self, formatter: &mut std::fmt::Formatter) -> std::fmt::Result {
-            formatter.write_str("a map of collection list")
-        }
-
-        fn visit_map<A>(self, mut map: A) -> Result<Self::Value, A::Error>
-        where
-            A: MapAccess<'de>,
-        {
-            let mut collection_list = HashMap::new();
-            while let Some((key, value)) = map.next_entry::<String, PathBuf>()? {
-                let collection_item = match key.split(':').collect::<Vec<&str>>().as_slice() {
-                    [prefix, mid, sid] => {
-                        let collection_type = match *prefix {
-                            "series" => CollectionType::Series,
-                            "season" => CollectionType::Season,
-                            _ => {
-                                return Err(serde::de::Error::custom(
-                                    "invalid collection type, should be series or season",
-                                ))
-                            }
-                        };
-                        CollectionItem {
-                            mid: mid.to_string(),
-                            sid: sid.to_string(),
-                            collection_type,
-                        }
-                    }
-                    _ => {
-                        return Err(serde::de::Error::custom(
-                            "invalid collection key, should be series:mid:sid or season:mid:sid",
-                        ))
-                    }
-                };
-                collection_list.insert(collection_item, value);
-            }
-            Ok(collection_list)
-        }
-    }
-
-    deserializer.deserialize_map(CollectionListVisitor)
-}
-
-use clap::Parser;
-
-#[derive(Parser)]
-#[command(version, about, long_about = None)]
-pub struct Args {
-    #[arg(short, long, env = "SCAN_ONLY")]
-    pub scan_only: bool,
-
-    #[arg(short, long, default_value = "None,bili_sync=info", env = "RUST_LOG")]
-    pub log_level: String,
-}
diff --git a/crates/bili_sync/src/config/clap.rs b/crates/bili_sync/src/config/clap.rs
new file mode 100644
index 0000000..342e50f
--- /dev/null
+++ b/crates/bili_sync/src/config/clap.rs
@@ -0,0 +1,11 @@
+use clap::Parser;
+
+#[derive(Parser)]
+#[command(version, about, long_about = None)]
+pub struct Args {
+    #[arg(short, long, env = "SCAN_ONLY")]
+    pub scan_only: bool,
+
+    #[arg(short, long, default_value = "None,bili_sync=info", env = "RUST_LOG")]
+    pub log_level: String,
+}
diff --git a/crates/bili_sync/src/config/global.rs b/crates/bili_sync/src/config/global.rs
new file mode 100644
index 0000000..4f0eccb
--- /dev/null
+++ b/crates/bili_sync/src/config/global.rs
@@ -0,0 +1,54 @@
+use std::path::PathBuf;
+
+use clap::Parser;
+use handlebars::handlebars_helper;
+use once_cell::sync::Lazy;
+
+use crate::config::clap::Args;
+use crate::config::Config;
+
+/// 全局的 CONFIG，可以从中读取配置信息
+pub static CONFIG: Lazy<Config> = Lazy::new(|| {
+    let config = Config::load().unwrap_or_else(|err| {
+        if err
+            .downcast_ref::<std::io::Error>()
+            .map_or(true, |e| e.kind() != std::io::ErrorKind::NotFound)
+        {
+            panic!("加载配置文件失败，错误为： {err}");
+        }
+        warn!("配置文件不存在，使用默认配置...");
+        Config::default()
+    });
+    // 放到外面，确保新的配置项被保存
+    info!("配置加载完毕，覆盖刷新原有配置");
+    config.save().unwrap();
+    // 检查配置文件内容
+    info!("校验配置文件内容...");
+    config.check();
+    config
+});
+
+/// 全局的 TEMPLATE，用来渲染 video_name 和 page_name 模板
+pub static TEMPLATE: Lazy<handlebars::Handlebars> = Lazy::new(|| {
+    let mut handlebars = handlebars::Handlebars::new();
+    handlebars_helper!(truncate: |s: String, len: usize| {
+        if s.chars().count() > len {
+            s.chars().take(len).collect::<String>()
+        } else {
+            s.to_string()
+        }
+    });
+    handlebars.register_helper("truncate", Box::new(truncate));
+    handlebars
+        .register_template_string("video", &CONFIG.video_name)
+        .unwrap();
+    handlebars.register_template_string("page", &CONFIG.page_name).unwrap();
+    handlebars
+});
+
+/// 全局的 ARGS，用来解析命令行参数
+pub static ARGS: Lazy<Args> = Lazy::new(Args::parse);
+
+/// 全局的 CONFIG_DIR，表示配置文件夹的路径
+pub static CONFIG_DIR: Lazy<PathBuf> =
+    Lazy::new(|| dirs::config_dir().expect("No config path found").join("bili-sync"));
diff --git a/crates/bili_sync/src/config/item.rs b/crates/bili_sync/src/config/item.rs
new file mode 100644
index 0000000..d973076
--- /dev/null
+++ b/crates/bili_sync/src/config/item.rs
@@ -0,0 +1,129 @@
+use std::collections::HashMap;
+use std::path::PathBuf;
+
+use serde::de::{Deserializer, MapAccess, Visitor};
+use serde::ser::SerializeMap;
+use serde::{Deserialize, Serialize};
+
+use crate::bilibili::{CollectionItem, CollectionType};
+
+/// 稍后再看的配置
+#[derive(Serialize, Deserialize, Default)]
+pub struct WatchLaterConfig {
+    pub enabled: bool,
+    pub path: PathBuf,
+}
+
+/// 每次执行操作后的延迟配置
+#[derive(Serialize, Deserialize, Default)]
+pub struct DelayConfig {
+    pub refresh_video_list: Option<Delay>,
+    pub fetch_video_detail: Option<Delay>,
+    pub download_video: Option<Delay>,
+    pub download_page: Option<Delay>,
+}
+
+/// 延迟的定义，支持固定时间和随机时间
+#[derive(Serialize, Deserialize)]
+#[serde(untagged, rename_all = "lowercase")]
+pub enum Delay {
+    Random { min: u64, max: u64 },
+    Fixed(u64),
+}
+
+/// NFO 文件使用的时间类型
+#[derive(Serialize, Deserialize, Default)]
+#[serde(rename_all = "lowercase")]
+pub enum NFOTimeType {
+    #[default]
+    FavTime,
+    PubTime,
+}
+
+/// 并发下载相关的配置
+#[derive(Serialize, Deserialize)]
+pub struct ConcurrentLimit {
+    pub video: usize,
+    pub page: usize,
+    pub delay: DelayConfig,
+}
+
+impl Default for ConcurrentLimit {
+    fn default() -> Self {
+        Self {
+            video: 3,
+            page: 2,
+            delay: DelayConfig::default(),
+        }
+    }
+}
+
+/* 后面是用于自定义 Collection 的序列化、反序列化的样板代码 */
+pub(super) fn serialize_collection_list<S>(
+    collection_list: &HashMap<CollectionItem, PathBuf>,
+    serializer: S,
+) -> Result<S::Ok, S::Error>
+where
+    S: serde::Serializer,
+{
+    let mut map = serializer.serialize_map(Some(collection_list.len()))?;
+    for (k, v) in collection_list {
+        let prefix = match k.collection_type {
+            CollectionType::Series => "series",
+            CollectionType::Season => "season",
+        };
+        map.serialize_entry(&[prefix, &k.mid, &k.sid].join(":"), v)?;
+    }
+    map.end()
+}
+
+pub(super) fn deserialize_collection_list<'de, D>(deserializer: D) -> Result<HashMap<CollectionItem, PathBuf>, D::Error>
+where
+    D: Deserializer<'de>,
+{
+    struct CollectionListVisitor;
+
+    impl<'de> Visitor<'de> for CollectionListVisitor {
+        type Value = HashMap<CollectionItem, PathBuf>;
+
+        fn expecting(&self, formatter: &mut std::fmt::Formatter) -> std::fmt::Result {
+            formatter.write_str("a map of collection list")
+        }
+
+        fn visit_map<A>(self, mut map: A) -> Result<Self::Value, A::Error>
+        where
+            A: MapAccess<'de>,
+        {
+            let mut collection_list = HashMap::new();
+            while let Some((key, value)) = map.next_entry::<String, PathBuf>()? {
+                let collection_item = match key.split(':').collect::<Vec<&str>>().as_slice() {
+                    [prefix, mid, sid] => {
+                        let collection_type = match *prefix {
+                            "series" => CollectionType::Series,
+                            "season" => CollectionType::Season,
+                            _ => {
+                                return Err(serde::de::Error::custom(
+                                    "invalid collection type, should be series or season",
+                                ))
+                            }
+                        };
+                        CollectionItem {
+                            mid: mid.to_string(),
+                            sid: sid.to_string(),
+                            collection_type,
+                        }
+                    }
+                    _ => {
+                        return Err(serde::de::Error::custom(
+                            "invalid collection key, should be series:mid:sid or season:mid:sid",
+                        ))
+                    }
+                };
+                collection_list.insert(collection_item, value);
+            }
+            Ok(collection_list)
+        }
+    }
+
+    deserializer.deserialize_map(CollectionListVisitor)
+}
diff --git a/crates/bili_sync/src/config/mod.rs b/crates/bili_sync/src/config/mod.rs
new file mode 100644
index 0000000..b7ddbda
--- /dev/null
+++ b/crates/bili_sync/src/config/mod.rs
@@ -0,0 +1,162 @@
+use std::borrow::Cow;
+use std::collections::HashMap;
+use std::path::PathBuf;
+use std::sync::Arc;
+
+use anyhow::Result;
+use arc_swap::ArcSwapOption;
+use serde::{Deserialize, Serialize};
+
+mod clap;
+mod global;
+mod item;
+
+use crate::bilibili::{CollectionItem, Credential, DanmakuOption, FilterOption};
+pub use crate::config::global::{ARGS, CONFIG, CONFIG_DIR, TEMPLATE};
+use crate::config::item::{deserialize_collection_list, serialize_collection_list, ConcurrentLimit};
+pub use crate::config::item::{Delay, NFOTimeType, WatchLaterConfig};
+
+fn default_time_format() -> String {
+    "%Y-%m-%d".to_string()
+}
+
+#[derive(Serialize, Deserialize)]
+pub struct Config {
+    pub credential: ArcSwapOption<Credential>,
+    pub filter_option: FilterOption,
+    #[serde(default)]
+    pub danmaku_option: DanmakuOption,
+    pub favorite_list: HashMap<String, PathBuf>,
+    #[serde(
+        default,
+        serialize_with = "serialize_collection_list",
+        deserialize_with = "deserialize_collection_list"
+    )]
+    pub collection_list: HashMap<CollectionItem, PathBuf>,
+    #[serde(default)]
+    pub submission_list: HashMap<String, PathBuf>,
+    #[serde(default)]
+    pub watch_later: WatchLaterConfig,
+    pub video_name: Cow<'static, str>,
+    pub page_name: Cow<'static, str>,
+    pub interval: u64,
+    pub upper_path: PathBuf,
+    #[serde(default)]
+    pub nfo_time_type: NFOTimeType,
+    #[serde(default)]
+    pub concurrent_limit: ConcurrentLimit,
+    #[serde(default = "default_time_format")]
+    pub time_format: String,
+}
+
+impl Default for Config {
+    fn default() -> Self {
+        Self {
+            credential: ArcSwapOption::from(Some(Arc::new(Credential::default()))),
+            filter_option: FilterOption::default(),
+            danmaku_option: DanmakuOption::default(),
+            favorite_list: HashMap::new(),
+            collection_list: HashMap::new(),
+            submission_list: HashMap::new(),
+            watch_later: Default::default(),
+            video_name: Cow::Borrowed("{{title}}"),
+            page_name: Cow::Borrowed("{{bvid}}"),
+            interval: 1200,
+            upper_path: CONFIG_DIR.join("upper_face"),
+            nfo_time_type: NFOTimeType::FavTime,
+            concurrent_limit: ConcurrentLimit::default(),
+            time_format: default_time_format(),
+        }
+    }
+}
+
+impl Config {
+    fn load() -> Result<Self> {
+        let config_path = CONFIG_DIR.join("config.toml");
+        let config_content = std::fs::read_to_string(config_path)?;
+        Ok(toml::from_str(&config_content)?)
+    }
+
+    pub fn save(&self) -> Result<()> {
+        let config_path = CONFIG_DIR.join("config.toml");
+        std::fs::create_dir_all(&*CONFIG_DIR)?;
+        std::fs::write(config_path, toml::to_string_pretty(self)?)?;
+        Ok(())
+    }
+
+    pub fn check(&self) {
+        let mut ok = true;
+        if self.favorite_list.is_empty() && self.collection_list.is_empty() && !self.watch_later.enabled {
+            ok = false;
+            error!("没有配置任何需要扫描的内容，程序空转没有意义");
+        }
+        if self.watch_later.enabled && !self.watch_later.path.is_absolute() {
+            error!(
+                "稍后再看保存的路径应为绝对路径，检测到：{}",
+                self.watch_later.path.display()
+            );
+        }
+        for path in self.favorite_list.values() {
+            if !path.is_absolute() {
+                ok = false;
+                error!("收藏夹保存的路径应为绝对路径，检测到: {}", path.display());
+            }
+        }
+        if !self.upper_path.is_absolute() {
+            ok = false;
+            error!("up 主头像保存的路径应为绝对路径");
+        }
+        if self.video_name.is_empty() {
+            ok = false;
+            error!("未设置 video_name 模板");
+        }
+        if self.page_name.is_empty() {
+            ok = false;
+            error!("未设置 page_name 模板");
+        }
+        let credential = self.credential.load();
+        match credential.as_deref() {
+            Some(credential) => {
+                if credential.sessdata.is_empty()
+                    || credential.bili_jct.is_empty()
+                    || credential.buvid3.is_empty()
+                    || credential.dedeuserid.is_empty()
+                    || credential.ac_time_value.is_empty()
+                {
+                    ok = false;
+                    error!("Credential 信息不完整，请确保填写完整");
+                }
+            }
+            None => {
+                ok = false;
+                error!("未设置 Credential 信息");
+            }
+        }
+        if !(self.concurrent_limit.video > 0 && self.concurrent_limit.page > 0) {
+            ok = false;
+            error!("允许的并发数必须大于 0");
+        }
+        for delay_config in [
+            &self.concurrent_limit.delay.refresh_video_list,
+            &self.concurrent_limit.delay.fetch_video_detail,
+            &self.concurrent_limit.delay.download_video,
+            &self.concurrent_limit.delay.download_page,
+        ]
+        .iter()
+        .filter_map(|x| x.as_ref())
+        {
+            if let Delay::Random { min, max } = delay_config {
+                if min >= max {
+                    ok = false;
+                    error!("随机延迟的最小值应小于最大值");
+                }
+            }
+        }
+        if !ok {
+            panic!(
+                "位于 {} 的配置文件不合法，请参考提示信息修复后继续运行",
+                CONFIG_DIR.join("config.toml").display()
+            );
+        }
+    }
+}
diff --git a/crates/bili_sync/src/workflow.rs b/crates/bili_sync/src/workflow.rs
index c6f66dc..dc446fd 100644
--- a/crates/bili_sync/src/workflow.rs
+++ b/crates/bili_sync/src/workflow.rs
@@ -60,7 +60,7 @@ pub async fn refresh_video_list<'a>(
             info!("到达上一次处理的位置，提前中止");
             break;
         }
-        delay(CONFIG.delay.refresh_video_list.as_ref()).await;
+        delay(CONFIG.concurrent_limit.delay.refresh_video_list.as_ref()).await;
     }
     new_count = video_list_model.video_count(connection).await? - new_count;
     video_list_model.log_refresh_video_end(got_count, new_count);
@@ -80,7 +80,7 @@ pub async fn fetch_video_details(
         video_list_model
             .fetch_videos_detail(video, video_model, connection)
             .await?;
-        delay(CONFIG.delay.fetch_video_detail.as_ref()).await;
+        delay(CONFIG.concurrent_limit.delay.fetch_video_detail.as_ref()).await;
     }
     video_list_model.log_fetch_video_end();
     Ok(video_list_model)
@@ -94,8 +94,7 @@ pub async fn download_unprocessed_videos(
 ) -> Result<()> {
     video_list_model.log_download_video_start();
     let unhandled_videos_pages = video_list_model.unhandled_video_pages(connection).await?;
-    // 对于视频，允许三个同时下载（视频内还有分页、不同分页还有多种下载任务）
-    let semaphore = Semaphore::new(3);
+    let semaphore = Semaphore::new(CONFIG.concurrent_limit.video);
     let downloader = Downloader::new(bili_client.client.clone());
     let mut uppers_mutex: HashMap<i64, (Mutex<()>, Mutex<()>)> = HashMap::new();
     for (video_model, _) in &unhandled_videos_pages {
@@ -232,7 +231,7 @@ pub async fn download_video_pages(
     }
     let mut video_active_model: video::ActiveModel = video_model.into();
     video_active_model.download_status = Set(status.into());
-    delay(CONFIG.delay.download_video.as_ref()).await;
+    delay(CONFIG.concurrent_limit.delay.download_video.as_ref()).await;
     Ok(video_active_model)
 }
 
@@ -247,8 +246,7 @@ pub async fn dispatch_download_page(
     if !should_run {
         return Ok(());
     }
-    // 对于视频的分页，允许两个同时下载（绝大部分是单页视频）
-    let child_semaphore = Semaphore::new(2);
+    let child_semaphore = Semaphore::new(CONFIG.concurrent_limit.page);
     let mut tasks = pages
         .into_iter()
         .map(|page_model| download_page(bili_client, video_model, page_model, &child_semaphore, downloader))
@@ -420,7 +418,7 @@ pub async fn download_page(
     let mut page_active_model: page::ActiveModel = page_model.into();
     page_active_model.download_status = Set(status.into());
     page_active_model.path = Set(Some(video_path.to_str().unwrap().to_string()));
-    delay(CONFIG.delay.download_page.as_ref()).await;
+    delay(CONFIG.concurrent_limit.delay.download_page.as_ref()).await;
     Ok(page_active_model)
 }