diff --git a/src/views/iot/device/components/DeviceAttributeForm.vue b/src/views/iot/device/components/DeviceAttributeForm.vue
index 3d72a2da..e1fe54fc 100644
--- a/src/views/iot/device/components/DeviceAttributeForm.vue
+++ b/src/views/iot/device/components/DeviceAttributeForm.vue
@@ -44,7 +44,7 @@
         <el-input v-model="formData.dataUnit" placeholder="请输入单位" />
       </el-form-item>
       <el-form-item label="倍率" prop="ratio">
-        <el-input v-model="formData.ratio" placeholder="请输入倍率" />
+        <el-input v-model="formData.ratio" placeholder="请输入倍率" :disabled="!ratioEnabled" />
       </el-form-item>
       <el-form-item label="顺序" prop="sort">
         <el-input v-model="formData.sort" placeholder="请输入顺序" @input="handleSortInput" />
@@ -104,6 +104,33 @@ const formData = ref({
   deviceId: undefined as number | undefined
 })
 
+const ratioEnabledTypes = new Set([
+  'uint8',
+  'uint16',
+  'uint32',
+  'uint64',
+  'int8',
+  'int16',
+  'int32',
+  'float32',
+  'float64'
+])
+
+const ratioEnabled = computed(() => {
+  const v = formData.value.dataType
+  if (!v) return false
+  return ratioEnabledTypes.has(v)
+})
+
+watch(
+  () => formData.value.dataType,
+  () => {
+    if (!ratioEnabled.value) {
+      formData.value.ratio = undefined
+    }
+  }
+)
+
 const handleAttributeCodeInput = (val: string) => {
   formData.value.attributeCode = val?.replace(/[\u4e00-\u9fa5]/g, '')
 }
@@ -190,7 +217,7 @@ const buildSubmitData = () => {
     dataType,
     address,
     dataUnit,
-    ratio,
+    ratio: ratioEnabled.value ? ratio : undefined,
     sort: parsedSort,
     remark,
     deviceId