diff --git a/src/table/hooks/useRowSelect.tsx b/src/table/hooks/useRowSelect.tsx
index d7539b193..dd6309761 100644
--- a/src/table/hooks/useRowSelect.tsx
+++ b/src/table/hooks/useRowSelect.tsx
@@ -55,20 +55,6 @@ export default function useRowSelect(
     return singleSelectCol.checkProps.allowUncheck;
   });
 
-  watch(
-    [data, pagination, reserveSelectedRowOnPaginate],
-    () => {
-      if (reserveSelectedRowOnPaginate.value) return;
-      const {
-        pageSize, current, defaultPageSize, defaultCurrent,
-      } = pagination.value;
-      const tPageSize = pageSize || defaultPageSize;
-      const tCurrent = current || defaultCurrent;
-      currentPaginateData.value = data.value.slice(tPageSize * (tCurrent - 1), tPageSize * tCurrent);
-    },
-    { immediate: true },
-  );
-
   watch(
     [data, columns, tSelectedRowKeys, selectColumn, rowKey],
     () => {
diff --git a/src/table/thead.tsx b/src/table/thead.tsx
index 0c4ce14f9..23404ae5f 100644
--- a/src/table/thead.tsx
+++ b/src/table/thead.tsx
@@ -146,6 +146,7 @@ export default defineComponent({
           const thClasses = [
             thStyles.classes,
             customClasses,
+            col.thClassName,
             {
               // 受 rowspan 影响，部分 tr > th:first-child 需要补足左边框
               [this.tableHeaderClasses.thBordered]: thBorderMap.get(col),