diff --git a/frontend/src/views/backtest/History.vue b/frontend/src/views/backtest/History.vue
index 03bdc93..8a19004 100644
--- a/frontend/src/views/backtest/History.vue
+++ b/frontend/src/views/backtest/History.vue
@@ -9,6 +9,8 @@ const tasks = ref<TaskListItem[]>([])
 const loading = ref(false)
 const deleting = ref(false)
 const selection = ref<TaskListItem[]>([])
+// reserve-selection 后勾选按 row-key 持久;删除完要显式清表内勾选
+const tableRef = ref()
 
 // 筛选
 const typeFilter = ref<'all' | 'cta' | 'portfolio' | 'optimize' | 'factor'>('all')
@@ -189,6 +191,7 @@ async function doDelete(rows: TaskListItem[]): Promise<void> {
   else ElMessage.success(`已删除 ${ids.length} 个任务`)
   deleting.value = false
   selection.value = []
+  tableRef.value?.clearSelection()
   await load()
 }
 
@@ -249,8 +252,8 @@ function durationText(row: TaskListItem): string {
     </div>
 
     <el-card v-loading="loading" class="table-card" shadow="never">
-      <el-table :data="paged" size="small" empty-text="暂无符合条件的任务" @selection-change="onSelectionChange">
-        <el-table-column type="selection" width="42" :selectable="isTerminal" />
+      <el-table ref="tableRef" :data="paged" size="small" row-key="task_id" empty-text="暂无符合条件的任务" @selection-change="onSelectionChange">
+        <el-table-column type="selection" width="42" :selectable="isTerminal" reserve-selection />
         <el-table-column label="任务 ID" min-width="170">
           <template #default="{ row }">
             <span v-if="canReplay(row)" class="mono task-link" title="点击跳到参数页(预填该任务参数)" @click="replayParams(row)">{{ row.task_id }}</span>