diff --git a/components/table/Table.tsx b/components/table/Table.tsx
index c05bce45e8..66f389a24d 100755
--- a/components/table/Table.tsx
+++ b/components/table/Table.tsx
@@ -776,7 +776,7 @@ export default class Table<T> extends React.Component<TableProps<T>, TableState<
   }
 
   getColumnKey(column: ColumnProps<T>, index?: number) {
-    return column.key || (column.dataIndex as string) || index;
+    return column.key || column.dataIndex || index;
   }
 
   getMaxCurrent(total: number) {