diff --git a/packages/renderer-core/src/renderer/base.tsx b/packages/renderer-core/src/renderer/base.tsx
index 75041f7c6..d4134c694 100644
--- a/packages/renderer-core/src/renderer/base.tsx
+++ b/packages/renderer-core/src/renderer/base.tsx
@@ -527,7 +527,7 @@ export default function baseRendererFactory() {
             engine?.props?.onCompGetCtx(schema, scope);
           }
           props.key = props.key || `${schema.__ctx.lceKey}_${schema.__ctx.idx || 0}_${idx !== undefined ? idx : ''}`;
-        } else if (typeof idx === 'number' && !props.key) {
+        } else if ((typeof idx === 'number' || typeof idx === 'string') && !props.key) {
           // 仅当循环场景走这里
           props.key = idx;
         }