diff --git a/docs/examples/loading/basic.vue b/docs/examples/loading/basic.vue
index be8685021e..a844a807d3 100644
--- a/docs/examples/loading/basic.vue
+++ b/docs/examples/loading/basic.vue
@@ -34,4 +34,7 @@ const tableData = [
 body {
   margin: 0;
 }
+.example-showcase .el-loading-mask {
+  z-index: 9;
+}
 </style>
diff --git a/docs/examples/loading/customization.vue b/docs/examples/loading/customization.vue
index acf1e4e72a..9e8386b652 100644
--- a/docs/examples/loading/customization.vue
+++ b/docs/examples/loading/customization.vue
@@ -58,3 +58,8 @@ const tableData = [
   },
 ]
 </script>
+<style>
+.example-showcase .el-loading-mask {
+  z-index: 9;
+}
+</style>
diff --git a/docs/examples/table-v2/overlay.vue b/docs/examples/table-v2/overlay.vue
index 089c3077d4..0654878759 100644
--- a/docs/examples/table-v2/overlay.vue
+++ b/docs/examples/table-v2/overlay.vue
@@ -52,3 +52,8 @@ const generateData = (
 const columns = generateColumns(10)
 const data = generateData(columns, 200)
 </script>
+<style>
+.example-showcase .el-table-v2__overlay {
+  z-index: 9;
+}
+</style>