diff --git a/backend/ruoyi-modules/ruoyi-aihr/src/main/java/org/dromara/aihr/service/AihrPracticeSeedService.java b/backend/ruoyi-modules/ruoyi-aihr/src/main/java/org/dromara/aihr/service/AihrPracticeSeedService.java
index 104a070d..21171d60 100644
--- a/backend/ruoyi-modules/ruoyi-aihr/src/main/java/org/dromara/aihr/service/AihrPracticeSeedService.java
+++ b/backend/ruoyi-modules/ruoyi-aihr/src/main/java/org/dromara/aihr/service/AihrPracticeSeedService.java
@@ -1488,6 +1488,9 @@ public class AihrPracticeSeedService {
     }
 
     public CalibrationResponse calibrate(String sessionId, CalibrationRequest request) {
+        if (request == null || request.correctedTotal() == null) {
+            throw new ServiceException("人工校准必须明确填写总分");
+        }
         ensurePracticeTable();
         ensureCalibrationTable();
         if (isBlank(sessionId)) {
@@ -1509,7 +1512,7 @@ public class AihrPracticeSeedService {
             return null;
         }
         ScoreSnapshot score = rows.get(0);
-        int correctedTotal = request == null || request.correctedTotal() == null ? score.total() : clampScore(request.correctedTotal());
+        int correctedTotal = clampScore(request.correctedTotal());
         LocalDateTime now = LocalDateTime.now();
         String reviewer = firstNonBlank(request == null ? null : request.reviewer(), "主管复盘");
         String reason = firstNonBlank(request == null ? null : request.reason(), "人工校准AI评分");
diff --git a/backend/ruoyi-modules/ruoyi-aihr/src/test/java/org/dromara/aihr/service/AihrPracticeSeedServiceTest.java b/backend/ruoyi-modules/ruoyi-aihr/src/test/java/org/dromara/aihr/service/AihrPracticeSeedServiceTest.java
index 0157c8b1..3a2d69cb 100644
--- a/backend/ruoyi-modules/ruoyi-aihr/src/test/java/org/dromara/aihr/service/AihrPracticeSeedServiceTest.java
+++ b/backend/ruoyi-modules/ruoyi-aihr/src/test/java/org/dromara/aihr/service/AihrPracticeSeedServiceTest.java
@@ -110,6 +110,15 @@ public class AihrPracticeSeedServiceTest {
         assertEquals("缺少员工ID，无法派发专项训练", error.getMessage());
     }
 
+    @Test
+    public void calibrationRequiresExplicitCorrectedScore() {
+        AihrPracticeSeedService service = new AihrPracticeSeedService(new ObjectMapper(), null, null, null);
+
+        ServiceException error = assertThrows(ServiceException.class, () -> service.calibrate("session-1", null));
+
+        assertEquals("人工校准必须明确填写总分", error.getMessage());
+    }
+
     @Test
     public void scenarioFilterKeepsRealEmptyDatabaseResultEmpty() {
         JdbcTemplate jdbcTemplate = mock(JdbcTemplate.class);
diff --git a/docs/BRD_IMPLEMENTATION_AUDIT.md b/docs/BRD_IMPLEMENTATION_AUDIT.md
index 535d9d06..ccb4af96 100644
--- a/docs/BRD_IMPLEMENTATION_AUDIT.md
+++ b/docs/BRD_IMPLEMENTATION_AUDIT.md
@@ -282,3 +282,4 @@
 - 2026-07-14 BRD 4.5/B5 人工贡献分默认值修复：管理端主管复盘表单此前默认填入 `10` 分，单纯点击“标记已复盘”可能产生未经主管确认的贡献分；现改为可选空值，只有明确填写的 `0–100` 分才提交并计入画像，页面文案同步为“人工贡献分”。后端既有空值保留逻辑不变，未新增积分来源；正式激励规则仍需 HR 确认。
 - 2026-07-14 BRD G3/4.5 人工评审身份留痕修复：对练校准和主管复盘接口此前接受客户端传入的 `reviewer`，可能把人工证据归到伪造的操作人；现由控制器从当前登录用户绑定校准人/复盘人，请求字段仅保留兼容，不再作为身份来源。补源码契约回归和 `demo-check` marker；正式试点仍需抽查校准记录、复盘建议与实际主管/HR 账号的对应关系。
 - 2026-07-14 BRD 4.5/G1 复盘证据状态边界修复：人工校准此前只按 `session_id` 查询，主管复盘更新也未显式要求完成时间，理论上可对未完成训练或非移动对练记录写入复核证据；现统一要求 `mode='mobile'` 且 `finished_time IS NOT NULL`，历史已完成记录不受影响。补服务回归断言和 `demo-check` marker，未修改业务数据。
+- 2026-07-14 BRD M5 人工校准样本完整性修复：校准接口此前在 `correctedTotal` 为空时自动复制 AI 原分数，空提交也会增加“人工校准样本”并可能虚高一致率；现要求明确提交人工总分，空值直接拒绝，前端请求类型同步改为必填。新增服务回归测试和 `demo-check` marker，不改变已有校准记录。
diff --git a/frontend/src/api/aihr/practice.ts b/frontend/src/api/aihr/practice.ts
index 57f7792c..42fc227e 100644
--- a/frontend/src/api/aihr/practice.ts
+++ b/frontend/src/api/aihr/practice.ts
@@ -151,7 +151,7 @@ export type PracticeFinishResponse = {
 
 export type PracticeCalibrationRequest = {
   reviewer?: string;
-  correctedTotal?: number;
+  correctedTotal: number;
   correctedCompliance?: number;
   correctedEmotion?: number;
   correctedCommunication?: number;
diff --git a/scripts/demo-check.sh b/scripts/demo-check.sh
index 8f93418a..1311217d 100755
--- a/scripts/demo-check.sh
+++ b/scripts/demo-check.sh
@@ -457,6 +457,7 @@ contains backend/ruoyi-modules/ruoyi-aihr/src/main/java/org/dromara/aihr/control
 contains backend/ruoyi-modules/ruoyi-aihr/src/main/java/org/dromara/aihr/controller/AihrPracticeController.java "practiceSeedService.finish(request, currentAppUsername())"
 contains backend/ruoyi-modules/ruoyi-aihr/src/main/java/org/dromara/aihr/service/AihrPracticeSeedService.java "训练会话不存在或无权访问"
 contains backend/ruoyi-modules/ruoyi-aihr/src/main/java/org/dromara/aihr/service/AihrPracticeSeedService.java "finished_time IS NOT NULL"
+contains backend/ruoyi-modules/ruoyi-aihr/src/main/java/org/dromara/aihr/service/AihrPracticeSeedService.java "人工校准必须明确填写总分"
 contains backend/ruoyi-modules/ruoyi-aihr/src/main/java/org/dromara/aihr/service/AihrPracticeSeedService.java "noneMatch(AihrPracticeSeedService::canSeeProject)"
 contains backend/ruoyi-modules/ruoyi-aihr/src/main/java/org/dromara/aihr/controller/AihrPracticeController.java "@SaCheckLogin"
 contains backend/ruoyi-modules/ruoyi-aihr/src/main/java/org/dromara/aihr/controller/AihrPracticeController.java "sessions/{sessionId}/annotations"