diff --git a/src/views/teacherEnd/taskReview/StudentTaskReadonlyPreview.vue b/src/views/teacherEnd/taskReview/StudentTaskReadonlyPreview.vue
index 1bfdd05..d601244 100644
--- a/src/views/teacherEnd/taskReview/StudentTaskReadonlyPreview.vue
+++ b/src/views/teacherEnd/taskReview/StudentTaskReadonlyPreview.vue
@@ -103,6 +103,7 @@ function isStepNavigation(element) {
 
 <style lang="scss" scoped>
 .student-task-readonly-preview :deep(.training-ai-sidebar),
-.student-task-readonly-preview :deep(.training-ai-evaluation) { display: none !important; }
+.student-task-readonly-preview :deep(.training-ai-evaluation),
+.student-task-readonly-preview :deep(.training-task-brief) { display: none !important; }
 .student-task-readonly-preview :deep(.student-training-shell) { grid-template-columns: minmax(0, 1fr) !important; }
 </style>
diff --git a/tests/task-review-preview.test.mjs b/tests/task-review-preview.test.mjs
index 0c51aaa..5c1ca80 100644
--- a/tests/task-review-preview.test.mjs
+++ b/tests/task-review-preview.test.mjs
@@ -47,6 +47,7 @@ assert.doesNotMatch(previewShell, /:global\(html\)|:global\(body\)/, "预览壳
 assert.doesNotMatch(previewShell, /pointer-events\s*:/, "预览壳不得用样式禁用学生页面控件");
 assert.match(previewShell, /training-ai-sidebar/, "评阅预览应隐藏 AI 助学");
 assert.match(previewShell, /training-ai-evaluation/, "评阅预览应隐藏 AI 助评");
+assert.match(previewShell, /training-task-brief/, "评阅预览应隐藏实训背景、目标和要求");
 assert.match(previewShell, /teacher-task-review-preview-height/, "预览页应向外层同步内容高度");
 assert.match(previewShell, /ResizeObserver/, "预览页内容变化后应重新同步高度");
 assert.match(reviewPanel, /writeTrainingReviewPreview/);