diff --git a/example/mpc_cmp_task_conf.json b/example/mpc_cmp_task_conf.json
new file mode 100644
index 00000000..36400a1b
--- /dev/null
+++ b/example/mpc_cmp_task_conf.json
@@ -0,0 +1,47 @@
+{
+    "task_type": "ACTOR_TASK",
+    "task_name": "mpc_cmp",
+    "task_lang": "proto",
+    "task_code": {
+        "code_file_path": "",
+        "code": "arithmetic"
+    },
+    "params": {
+        "ResFileName": {
+            "type": "STRING",
+            "value": "data/result/mpc_cmp_result.csv"
+        },
+        "Expr": {
+            "type": "STRING",
+            "value": "CMP(A, B)"
+        },
+        "RevealToParties": {
+            "type": "STRING",
+            "value": "PARTY2"
+        },
+        "Col_And_Owner": {
+            "type": "STRING",
+            "value": "A-PARTY0;B-PARTY1"
+        },
+        "Col_And_Dtype": {
+            "descrtion": "0: int64_t, 1: double",
+            "type": "STRING",
+            "value": "A-0;B-0"
+        },
+        "Accuracy": {
+            "type": "STRING",
+            "value": "D16"
+        }
+    },
+    "party_datasets": {
+        "PARTY0": {
+          "Data_File": "mpc_arithmetic_0"
+        },
+        "PARTY1": {
+          "Data_File": "mpc_arithmetic_1"
+        },
+        "PARTY2": {
+          "Data_File": "FAKE_DATA_PARTY_2"
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/primihub/algorithm/arithmetic.cc b/src/primihub/algorithm/arithmetic.cc
index 2bb24e26..1ff04fed 100644
--- a/src/primihub/algorithm/arithmetic.cc
+++ b/src/primihub/algorithm/arithmetic.cc
@@ -94,6 +94,7 @@ int ArithmeticExecutor<Dbit>::loadParams(primihub::rpc::Task &task) {
 
     // col_and_owner
     std::string col_and_owner = param_map["Col_And_Owner"].value_string();
+    TrimAll(col_and_owner);
     std::vector<std::string> tmp1, tmp2, tmp3;
     str_split(col_and_owner, &tmp1, ';');
     for (auto itr = tmp1.begin(); itr != tmp1.end(); itr++) {
@@ -113,6 +114,7 @@ int ArithmeticExecutor<Dbit>::loadParams(primihub::rpc::Task &task) {
     // LOG(INFO) << col_and_owner;
 
     std::string col_and_dtype = param_map["Col_And_Dtype"].value_string();
+    TrimAll(col_and_dtype);
     str_split(col_and_dtype, &tmp2, ';');
     for (auto itr = tmp2.begin(); itr != tmp2.end(); itr++) {
       int pos = itr->find('-');
@@ -124,6 +126,7 @@ int ArithmeticExecutor<Dbit>::loadParams(primihub::rpc::Task &task) {
     // LOG(INFO) << col_and_dtype;
 
     expr_ = param_map["Expr"].value_string();
+    TrimAll(expr_);
     int comma_index = expr_.find(",");
     cmp_col1 = expr_.substr(4, comma_index - 4);
     cmp_col2 = expr_.substr(comma_index + 1, expr_.length() - comma_index - 2);
diff --git a/src/primihub/util/util.cc b/src/primihub/util/util.cc
index 5b6d4ada..2c3e31a1 100755
--- a/src/primihub/util/util.cc
+++ b/src/primihub/util/util.cc
@@ -226,4 +226,28 @@ std::string buf_to_hex_string(const uint8_t* pdata, size_t size) {
   return ss.str();
 }
 
+void TrimLeft(std::string& str) {
+  if (str.empty()) {
+    return;
+  }
+  str.erase(str.begin(),
+    std::find_if(str.begin(), str.end(), [](unsigned char ch) {
+      return !std::isspace(ch);}));
+}
+
+void TrimRight(std::string& str) {
+  if (str.empty()) {
+    return;
+  }
+  str.erase(std::find_if(str.rbegin(), str.rend(), [](unsigned char ch) {
+      return !std::isspace(ch);}).base(), str.end());
+}
+
+void TrimAll(std::string& str) {
+  if (str.empty()) {
+    return;
+  }
+  str.erase(remove_if(str.begin(), str.end(), [](unsigned char ch) {
+      return std::isspace(ch);}), str.end());
+}
 }  // namespace primihub
diff --git a/src/primihub/util/util.h b/src/primihub/util/util.h
index c61fd977..bdbadb97 100755
--- a/src/primihub/util/util.h
+++ b/src/primihub/util/util.h
@@ -36,6 +36,9 @@ retcode pbNode2Node(const primihub::rpc::Node& pb_node, Node* node);
 retcode node2PbNode(const Node& node, rpc::Node* pb_node);
 retcode parseToNode(const std::string& node_info, Node* node);
 retcode parseTopbNode(const std::string& node_info, rpc::Node* node);
+void TrimLeft(std::string& str);
+void TrimRight(std::string& str);
+void TrimAll(std::string& str);
 
 class SCopedTimer {
  public: