diff --git a/RichPreviewer.cpp b/RichPreviewer.cpp
index 5dedc85..5ffc1f8 100644
--- a/RichPreviewer.cpp
+++ b/RichPreviewer.cpp
@@ -159,13 +159,15 @@ int main(int argc, char* argv[])
     CommandParser& parser = CommandParser::GetInstance();
     vector<string> strs;
     for (int i = 1; i < argc; ++i) {
+        if (parser.IsMainArgLengthInvalid(argv[i]))
+            return START_PARAM_INVALID_CODE;
         strs.push_back(argv[i]);
     }
 
     if (!parser.ProcessCommand(strs)) {
         return 0;
     }
-
+    // check params
     if (!parser.IsCommandValid()) {
         return START_PARAM_INVALID_CODE;
     }
diff --git a/ThinPreviewer.cpp b/ThinPreviewer.cpp
index d2116d7..57b44f9 100644
--- a/ThinPreviewer.cpp
+++ b/ThinPreviewer.cpp
@@ -149,6 +149,8 @@ int main(int argc, char* argv[])
     CommandParser& parser = CommandParser::GetInstance();
     vector<string> strs;
     for (int i = 1; i < argc; ++i) {
+        if (parser.IsMainArgLengthInvalid(argv[i]))
+            return START_PARAM_INVALID_CODE;
         strs.push_back(argv[i]);
     }
 
diff --git a/util/CommandParser.cpp b/util/CommandParser.cpp
index 9a662c0..1be3a70 100644
--- a/util/CommandParser.cpp
+++ b/util/CommandParser.cpp
@@ -848,4 +848,14 @@ bool CommandParser::IsStaticCardValid()
         staticCard = true;
     }
     return true;
+}
+
+bool CommandParser::IsMainArgLengthInvalid(const char* str) const
+{
+    size_t argLength = strlen(str);
+    if (argLength > maxMainArgLength) {
+        ELOG("param size is more than %d", maxMainArgLength);
+        return true;
+    }
+    return false;
 }
\ No newline at end of file
diff --git a/util/CommandParser.h b/util/CommandParser.h
index 015dbd6..a941eb6 100644
--- a/util/CommandParser.h
+++ b/util/CommandParser.h
@@ -58,6 +58,7 @@ public:
     bool IsComponentMode() const;
     std::string GetAbilityPath() const;
     bool IsStaticCard() const;
+    bool IsMainArgLengthInvalid(const char* str) const;
 
 private:
     CommandParser();
@@ -112,6 +113,7 @@ private:
     bool isComponentMode;
     std::string abilityPath;
     bool staticCard;
+    const size_t maxMainArgLength = 1024;
 
     bool IsDebugPortValid();
     bool IsAppPathValid();