diff --git a/src/service/field.go b/src/service/field.go
index a849405e5db3f16e7909f28ebe7e57f521abce24..413a27b574025b4f438fdea343bdd5b2f0c958a3 100644
--- a/src/service/field.go
+++ b/src/service/field.go
@@ -284,7 +284,9 @@ func FiledFilter(proxyData model.ProxyData, respbody []byte) []byte {
 	fields = dataconvertutil.GetResponseField(proxyData.ResFields)
 	_, arrmodel := dataconvertutil.ConvertJson(fields)
 	realData := make(map[string]interface{})
-	json.Unmarshal(respbody, &realData)
+	if err := json.Unmarshal(respbody, &realData); err != nil {
+		return respbody
+	}
 	if arrmodel != nil && len(arrmodel) != 0 && len(realData) != 0 {
 		bytes, _ := json.Marshal(Change(arrmodel[0], realData))
 		return bytes