diff --git a/src/components/customField/AddForm.vue b/src/components/customField/AddForm.vue
index ef4d2b5f..92f27b4f 100644
--- a/src/components/customField/AddForm.vue
+++ b/src/components/customField/AddForm.vue
@@ -663,7 +663,7 @@ export default {
     submit () {
       this.$refs.ruleForm.validate(valid => {
         if (valid) {
-          const formInline = JSON.parse(JSON.stringify(this.formInline))
+          const formInline = { ...this.formInline }
           Object.keys(formInline).forEach(res => {
             if (formInline[res] instanceof Array) {
               if (formInline[res][0] instanceof Object) {
@@ -672,6 +672,9 @@ export default {
               } else {
                 formInline[res] = formInline[res].join(',')
               }
+            } else if (typeof formInline[res] === 'undefined') {
+              // 说明是undefined，改成空字符串,为了解决下拉框改成undefined时，不会传给后端该字段，改不了下拉框值的问题
+              formInline[res] = ''
             }
           })
           this.$emit('submitFormData', formInline)