diff --git a/src/poll.ts b/src/poll.ts
index 0e8f662..2eb9651 100644
--- a/src/poll.ts
+++ b/src/poll.ts
@@ -19,6 +19,8 @@ async function updateBx() {
         if (resp.data.aaData.length) {
             JsonCourseList.bx.length = 0
             JsonCourseList.bx.push(...resp.data.aaData)
+        } else {
+            throw new Error(resp.data)
         }
     } catch (_e) {
         console.log('获取必修JsonList失败 at ' + getTimeNow())
@@ -32,6 +34,8 @@ async function updateXx() {
         if (resp.data.aaData.length) {
             JsonCourseList.xx.length = 0
             JsonCourseList.xx.push(...resp.data.aaData)
+        } else {
+            throw new Error(resp.data)
         }
     } catch (_e) {
         console.log('获取限选JsonList失败 at ' + getTimeNow())
@@ -45,6 +49,8 @@ async function updateRx() {
         if (resp.data.aaData.length) {
             JsonCourseList.rx.length = 0
             JsonCourseList.rx.push(...resp.data.aaData)
+        } else {
+            throw new Error(resp.data)
         }
     } catch (_e) {
         console.log('获取任选JsonList失败 at ' + getTimeNow())