diff --git a/mes-ui/mes-ui-admin-vue3/src/views/heli/material/MaterialForm.vue b/mes-ui/mes-ui-admin-vue3/src/views/heli/material/MaterialForm.vue
index 556e3257..35bc408f 100644
--- a/mes-ui/mes-ui-admin-vue3/src/views/heli/material/MaterialForm.vue
+++ b/mes-ui/mes-ui-admin-vue3/src/views/heli/material/MaterialForm.vue
@@ -120,6 +120,7 @@
   </Dialog>
 </template>
 <script setup lang="ts">
+import { nextTick } from 'vue'
 import { getIntDictOptions, getStrDictOptions, getBoolDictOptions, DICT_TYPE } from '@/utils/dict'
 import * as MaterialApi from '@/api/heli/material'
 import {getSupplierPage} from "@/api/heli/supplier";
@@ -174,6 +175,8 @@ const formRef = ref() // 表单 Ref
 const supplierList = ref<any[]>([]) //
 const supplierSelectList = ref<any[]>([])
 const supplierSelectLoading = ref(false);
+const isLoading = ref(false) // 是否正在加载数据，防止加载时触发watch
+const originalMatCate = ref() // 记录打开时的物料大类，用于判断是否用户主动修改
 
 const remoteSupplierSearch = (query: string) => {
   if (query) {
@@ -196,9 +199,13 @@ const open = async (type: string, id?: number) => {
   resetForm()
   // 修改时，设置数据
   formLoading.value = true
+  isLoading.value = true
   try {
     if (id) {
-      formData.value = await MaterialApi.getMaterial(id)
+      const data = await MaterialApi.getMaterial(id)
+      formData.value = data
+      // 记录原始物料大类
+      originalMatCate.value = data.matCate
     }
     let params = {
       pageNo: 1,
@@ -210,6 +217,9 @@ const open = async (type: string, id?: number) => {
     supplierSelectList.value = supplierData.list;
   } finally {
     formLoading.value = false
+    nextTick(() => {
+      isLoading.value = false
+    })
   }
 
 }
@@ -280,8 +290,18 @@ const handleSelectedSupplier = (newValue: any) => {
 
 /** 监听物料类型变化，查询matcode并更新code */
 watch(() => formData.value.matCate, async (newVal) => {
+    // 如果正在加载数据，不处理
+    if (isLoading.value) {
+        return
+    }
+    // 如果新值为空，清空编码
     if (!newVal) {
         formData.value.code = undefined
+        originalMatCate.value = undefined
+        return
+    }
+    // 如果是编辑模式，且值没有变化（初始加载），不更新编码
+    if (formType.value === 'update' && newVal === originalMatCate.value) {
         return
     }
     try {