diff --git a/components/lib/multiselect/MultiSelect.vue b/components/lib/multiselect/MultiSelect.vue
index 3037866cb3..5175103c55 100755
--- a/components/lib/multiselect/MultiSelect.vue
+++ b/components/lib/multiselect/MultiSelect.vue
@@ -273,8 +273,8 @@ export default {
         getOptionValue(option) {
             return this.optionValue ? ObjectUtils.resolveFieldData(option, this.optionValue) : option;
         },
-        getOptionRenderKey(option) {
-            return this.dataKey ? ObjectUtils.resolveFieldData(option, this.dataKey) : this.getOptionLabel(option);
+        getOptionRenderKey(option, index) {
+            return this.dataKey ? ObjectUtils.resolveFieldData(option, this.dataKey) : this.getOptionLabel(option) + `_${index}`;
         },
         getHeaderCheckboxPTOptions(key) {
             return this.ptm(key, {