diff --git a/agent/middleware/operation.go b/agent/middleware/operation.go
index cb47a701e64c..6bae99dc4985 100644
--- a/agent/middleware/operation.go
+++ b/agent/middleware/operation.go
@@ -75,7 +75,9 @@ func OperationResolveMeta() gin.HandlerFunc {
 				if strings.Contains(c.Request.Header.Get("Content-Type"), "multipart/form-data") {
 					bodyMap, _ = parseMultipart(body, c.Request.Header.Get("Content-Type"))
 				} else {
-					_ = json.Unmarshal(body, &bodyMap)
+					decoder := json.NewDecoder(bytes.NewReader(body))
+					decoder.UseNumber()
+					_ = decoder.Decode(&bodyMap)
 				}
 				for _, key := range meta.BodyKeys {
 					if value, ok := bodyMap[key]; ok {
diff --git a/core/middleware/operation.go b/core/middleware/operation.go
index 1b372f793927..f7b36d58279e 100644
--- a/core/middleware/operation.go
+++ b/core/middleware/operation.go
@@ -78,7 +78,9 @@ func OperationLog() gin.HandlerFunc {
 			if strings.Contains(c.Request.Header.Get("Content-Type"), "multipart/form-data") {
 				bodyMap, _ = parseMultipart(body, c.Request.Header.Get("Content-Type"))
 			} else {
-				_ = json.Unmarshal(body, &bodyMap)
+				decoder := json.NewDecoder(bytes.NewReader(body))
+				decoder.UseNumber()
+				_ = decoder.Decode(&bodyMap)
 			}
 			for _, key := range operationDic.BodyKeys {
 				if _, ok := bodyMap[key]; ok {