diff --git a/backend/services/attendance_service.py b/backend/services/attendance_service.py
index 4099047..a983438 100644
--- a/backend/services/attendance_service.py
+++ b/backend/services/attendance_service.py
@@ -75,10 +75,15 @@ class AttendanceService:
                 points_change = -settings.DEDUCTION_ATTENDANCE_LATE
             else:
                 points_change = -settings.DEDUCTION_ATTENDANCE_LEAVE
-            
             # 创建扣分记录
             student = await StudentModel.get_by_id(student_id)
             if student:
+                # 检查分数是否会超出范围（防止溢出）
+                current_points = student.get("total_points", 0)
+                new_points = current_points + points_change
+                if new_points < 0:
+                    return {"success": False, "message": f"分数不能为负（当前{current_points}，扣{abs(points_change)}）"}
+                
                 # 获取操作人姓名
                 user = await UserModel.get_by_user_id(recorder_id)
                 recorder_name = user.get("real_name", "班主任") if user else "班主任"
@@ -99,6 +104,7 @@ class AttendanceService:
                 
                 # 标记已应用扣分
                 await AttendanceModel.mark_deduction_applied(attendance_id)
+                await AttendanceModel.mark_deduction_applied(attendance_id)
         
         logger.info(f"用户[{recorder_id}] 添加考勤记录[{attendance_id}] -> {status}")
         
diff --git a/backend/services/conduct_service.py b/backend/services/conduct_service.py
index 3fddf9d..2201d24 100644
--- a/backend/services/conduct_service.py
+++ b/backend/services/conduct_service.py
@@ -80,6 +80,18 @@ class ConductService:
                     fail_count += 1
                     continue
                 
+                # 检查分数是否会超出范围（防止溢出）
+                current_points = student.get("total_points", 0)
+                new_points = current_points + points_change
+                if new_points < 0:
+                    details.append({"student_id": student_id, "error": f"分数不能为负（当前{current_points}，操作{points_change}）"})
+                    fail_count += 1
+                    continue
+                if new_points > 100:
+                    details.append({"student_id": student_id, "error": f"分数不能超过100（当前{current_points}，操作{points_change}）"})
+                    fail_count += 1
+                    continue
+                
                 # 创建记录
                 record_id = await ConductModel.create_record(
                     student_id=student_id,
@@ -102,7 +114,7 @@ class ConductService:
                 fail_count += 1
         
         return {
-            "success": True,
+            "success": fail_count == 0,
             "success_count": success_count,
             "fail_count": fail_count,
             "details": details
diff --git a/frontend/admin/conduct.php b/frontend/admin/conduct.php
index b257704..7c26be5 100644
--- a/frontend/admin/conduct.php
+++ b/frontend/admin/conduct.php
@@ -35,6 +35,9 @@ include __DIR__ . '/../includes/header.php';
         <div class="action-bar">
             <div class="action-buttons">
                 <button class="btn btn-primary" onclick="showBatchPointsModal()">批量加减分</button>
+                <?php if ($role === '班主任'): ?>
+                <button class="btn btn-secondary" onclick="exportConductRecords()">导出记录</button>
+                <?php endif; ?>
             </div>
         </div>
         
@@ -93,6 +96,55 @@ function showSinglePointsModal(studentId, studentName) {
     document.getElementById('batchPointsModal').style.display = 'flex';
 }
 
+// 导出操行分记录
+async function exportConductRecords() {
+    const startDate = prompt('请输入开始日期（格式：YYYY-MM-DD，留空则不限）:', '');
+    if (startDate === null) return;
+    const endDate = prompt('请输入结束日期（格式：YYYY-MM-DD，留空则不限）:', '');
+    if (endDate === null) return;
+    
+    showToast('正在导出...', 'info');
+    
+    try {
+        const params = { page: 1, page_size: 10000 };
+        if (startDate) params.start_date = startDate;
+        if (endDate) params.end_date = endDate;
+        
+        const res = await apiGet('/api/admin/conduct/history', params);
+        if (res && res.success && res.data.records) {
+            const records = res.data.records;
+            if (records.length === 0) {
+                showToast('没有找到记录', 'warning');
+                return;
+            }
+            
+            // 构建CSV内容
+            let csv = '\uFEFF'; // BOM for UTF-8
+            csv += '时间,学号,姓名,分数变动,原因,操作人\n';
+            records.forEach(r => {
+                csv += `${r.created_at || ''},${r.student_no || ''},${r.student_name || ''},${r.points_change > 0 ? '+' : ''}${r.points_change},${(r.reason || '').replace(/,/g, ';')},${r.recorder_name || ''}\n`;
+            });
+            
+            // 下载文件
+            const blob = new Blob([csv], { type: 'text/csv;charset=utf-8;' });
+            const url = URL.createObjectURL(blob);
+            const link = document.createElement('a');
+            link.href = url;
+            link.download = `操行分记录_${new Date().toISOString().slice(0,10)}.csv`;
+            document.body.appendChild(link);
+            link.click();
+            document.body.removeChild(link);
+            URL.revokeObjectURL(url);
+            
+            showToast(`导出成功，共${records.length}条记录`);
+        } else {
+            showToast('导出失败：' + (res?.message || '未知错误'), 'error');
+        }
+    } catch (err) {
+        showToast('导出失败：' + err.message, 'error');
+    }
+}
+
 loadStudents();
 </script>
 <script src="/assets/js/admin.js"></script>
diff --git a/frontend/admin/dashboard.php b/frontend/admin/dashboard.php
index ddd6ee7..ac62e7e 100644
--- a/frontend/admin/dashboard.php
+++ b/frontend/admin/dashboard.php
@@ -63,6 +63,7 @@ async function loadDashboard() {
     }
     if ('<?php echo $role; ?>' === '班主任') {
         quickActions += '<button class="btn btn-success" onclick="location.href=\'/admin/students.php\'">导入学生</button>';
+        quickActions += '<button class="btn btn-secondary" onclick="location.href=\'/admin/conduct.php\'">导出记录</button>';
     }
     document.getElementById('quickActions').innerHTML = quickActions || '<p>暂无快捷操作</p>';