diff --git a/src/components/device/device-card/components/current-diag/security-box-circuit-link-modal.vue b/src/components/device/device-card/components/current-diag/security-box-circuit-link-modal.vue
index ac99f62..c154a47 100644
--- a/src/components/device/device-card/components/current-diag/security-box-circuit-link-modal.vue
+++ b/src/components/device/device-card/components/current-diag/security-box-circuit-link-modal.vue
@@ -68,7 +68,9 @@ const { mutate: linkPortToDevice, isPending: linking } = useMutation({
     const lowerDeviceDbId = lowerDevice.value?.id;
     if (!lowerDeviceDbId) throw new Error('该设备没有ID');
 
-    // 0. 检查上游设备的linkDescription的downstream字段是否存在某个端口已经关联下游设备
+    // 0. 检查是否会导致循环关联，
+    if (upperDeviceDbId === lowerDeviceDbId) throw new Error('不能关联到自身');
+    // 以及检查上游设备的linkDescription的downstream字段是否存在某个端口已经关联下游设备
     const duplicated = Object.entries(upperDeviceLinkDescription.value?.downstream ?? {}).find(([, deviceStoreIndex]) => {
       return deviceStoreIndex.deviceDbId === lowerDeviceDbId;
     });
diff --git a/src/components/device/device-card/components/current-diag/switch-port-link-modal.vue b/src/components/device/device-card/components/current-diag/switch-port-link-modal.vue
index 70b4682..fe6636c 100644
--- a/src/components/device/device-card/components/current-diag/switch-port-link-modal.vue
+++ b/src/components/device/device-card/components/current-diag/switch-port-link-modal.vue
@@ -78,7 +78,9 @@ const { mutate: linkPortToDevice, isPending: linking } = useMutation({
     const lowerDeviceDbId = lowerDevice.value?.id;
     if (!lowerDeviceDbId) throw new Error('该设备没有ID');
 
-    // 0. 检查上游设备的linkDescription的downstream字段是否存在某个端口已经关联下游设备
+    // 0. 检查是否会导致循环关联，
+    if (upperDeviceDbId === lowerDeviceDbId) throw new Error('不能关联到自身');
+    // 以及检查上游设备的linkDescription的downstream字段是否存在某个端口已经关联下游设备
     const duplicated = Object.entries(upperDeviceLinkDescription.value?.downstream ?? {}).find(([, deviceStoreIndex]) => {
       return deviceStoreIndex.deviceDbId === lowerDeviceDbId;
     });