diff --git a/runtime/base/json_parser.h b/runtime/base/json_parser.h
index edbe03dbb8936fd1408ab5a9fca5715954ba9ccf..fd6644b0ff499e738eaf8669afad41274b2e162f 100644
--- a/runtime/base/json_parser.h
+++ b/runtime/base/json_parser.h
@@ -30,6 +30,7 @@
 #include "plugins/ecmascript/runtime/js_handle.h"
 #include "plugins/ecmascript/runtime/js_tagged_value.h"
 #include "plugins/ecmascript/runtime/object_factory.h"
+#include "plugins/ecmascript/es2panda/util/helpers.h"
 
 namespace panda::ecmascript::base {
 constexpr unsigned int UNICODE_DIGIT_LENGTH = 4;
@@ -133,7 +134,11 @@ private:
             if (isFast) {
                 std::string strNum(current_, end_ + 1);
                 current_ = end_;
-                return JSTaggedValue(std::stod(strNum));
+                auto d = std::stod(strNum);
+                if (es2panda::util::Helpers::IsInteger<int32_t>(d)) {
+                    return JSTaggedValue(static_cast<int32_t>(d));
+                }
+                return JSTaggedValue(d);
             }
         }