diff --git a/src/components/device-page/device-card/history-diag-card/switch-port-history-diag-card.vue b/src/components/device-page/device-card/history-diag-card/switch-port-history-diag-card.vue
index 5d9316d..c8bf850 100644
--- a/src/components/device-page/device-card/history-diag-card/switch-port-history-diag-card.vue
+++ b/src/components/device-page/device-card/history-diag-card/switch-port-history-diag-card.vue
@@ -67,7 +67,7 @@ const tableColumns: DataTableColumns<SwitchPortRowData> = [
       const { diagInfo } = rowData;
       const { info } = diagInfo;
       const { overFlowPorts } = info;
-      return `${overFlowPorts.join(', ')}`;
+      return h('pre', {}, { default: () => overFlowPorts.join('\n') });
     },
   },
   {