diff --git a/entry/src/main/ets/common/AccountStore.ets b/entry/src/main/ets/common/AccountStore.ets
index 051b8a1..32c7854 100644
--- a/entry/src/main/ets/common/AccountStore.ets
+++ b/entry/src/main/ets/common/AccountStore.ets
@@ -77,6 +77,14 @@ export class CalSource {
   source: string = 'dav'; // 'dav' | 'system' | 'local'
   visible: boolean = true;
   writable: boolean = true; // 只读日历本中的日程只能查看详情，不能编辑
+  /**
+   * 本支持哪些组件（来自服务器 COMP_SET 声明）：
+   *   'event'   纯日历本（新建日程可选，新建待办不可选）
+   *   'todo'    纯待办本（反过来）
+   *   'both'    两者都可
+   *   'unknown' 服务器未声明 → 两边都按可用处理（旧数据兼容）
+   */
+  comps: string = 'unknown';
 }
 
 /** 与 UI 无关的调色板 */
diff --git a/entry/src/main/ets/common/CalendarDataService.ets b/entry/src/main/ets/common/CalendarDataService.ets
index ab58255..f9279d8 100644
--- a/entry/src/main/ets/common/CalendarDataService.ets
+++ b/entry/src/main/ets/common/CalendarDataService.ets
@@ -117,6 +117,9 @@ export class CalendarDataService {
           const detected: boolean = acc.calendarWritable.length > i
             ? acc.calendarWritable[i] !== '0' : true;
           s.writable = detected && !manualKeys.includes(s.calKey);
+          // 透传本支持的类型（新建待办/日程时据此过滤，避免把待办写进纯日历本）
+          s.comps = i < acc.calendarComps.length && acc.calendarComps[i] !== ''
+            ? acc.calendarComps[i] : 'unknown';
           sources.push(s);
         }
       }
diff --git a/entry/src/main/ets/pages/EventEditPage.ets b/entry/src/main/ets/pages/EventEditPage.ets
index 492503f..ce61bfd 100644
--- a/entry/src/main/ets/pages/EventEditPage.ets
+++ b/entry/src/main/ets/pages/EventEditPage.ets
@@ -2159,6 +2159,13 @@ class CalendarDataBridge {
         if (!detected || manualKeys.includes(`${acc.id}_${i}`)) {
           continue;
         }
+        // ⭐ 只列**能放日程**的本：纯待办本（COMP_SET 只有 VTODO）写不进 VEVENT。
+        //    'both' / 'unknown' 保留，理由同 Index.openTodoCreator。
+        const comp: string = i < acc.calendarComps.length && acc.calendarComps[i] !== ''
+          ? acc.calendarComps[i] : 'unknown';
+        if (comp === 'todo') {
+          continue;
+        }
         const s = new CalSourceWithHref();
         s.calKey = `${acc.id}_${i}`;
         let name: string = i < acc.calendarNames.length ? acc.calendarNames[i] : '';
diff --git a/entry/src/main/ets/pages/Index.ets b/entry/src/main/ets/pages/Index.ets
index 71ff51f..1a0fb99 100644
--- a/entry/src/main/ets/pages/Index.ets
+++ b/entry/src/main/ets/pages/Index.ets
@@ -3174,6 +3174,11 @@ struct Index {
       if (!s.writable || s.source !== 'dav') {
         continue;
       }
+      // ⭐ 只列**能放待办**的本：纯日历本（COMP_SET 只有 VEVENT）写不进 VTODO。
+      //    'both' / 'unknown' 都保留 —— unknown 是服务器未声明或旧数据，不能武断排除。
+      if (s.comps === 'event') {
+        continue;
+      }
       // calKey 形如 "<accountId>_<index>"
       const us: number = s.calKey.lastIndexOf('_');
       if (us <= 0) {