diff --git a/src/main/java/com/sztzjy/linkCommerce/controller/stu/StudentTrainingAnswerController.java b/src/main/java/com/sztzjy/linkCommerce/controller/stu/StudentTrainingAnswerController.java
index 1065cf1..611a999 100644
--- a/src/main/java/com/sztzjy/linkCommerce/controller/stu/StudentTrainingAnswerController.java
+++ b/src/main/java/com/sztzjy/linkCommerce/controller/stu/StudentTrainingAnswerController.java
@@ -41,6 +41,8 @@ import com.sztzjy.linkCommerce.entity.dto.ConsumerScenarioStepOneValidationReque
 import com.sztzjy.linkCommerce.entity.dto.ConsumerScenarioStepOneValidationResult;
 import com.sztzjy.linkCommerce.entity.dto.ConsumerScenarioStepTwoValidationRequest;
 import com.sztzjy.linkCommerce.entity.dto.ConsumerScenarioStepTwoValidationResult;
+import com.sztzjy.linkCommerce.entity.dto.ConsumerScenarioStepThreeValidationRequest;
+import com.sztzjy.linkCommerce.entity.dto.ConsumerScenarioStepThreeValidationResult;
 import com.sztzjy.linkCommerce.service.NewProductSurveyStepOneService;
 import com.sztzjy.linkCommerce.service.MarketOpportunitySelectionStepOneService;
 import com.sztzjy.linkCommerce.service.MarketOpportunitySelectionStepTwoService;
@@ -59,6 +61,7 @@ import com.sztzjy.linkCommerce.service.ConsumerBehaviorStepThreeService;
 import com.sztzjy.linkCommerce.service.ConsumerBehaviorStepFourService;
 import com.sztzjy.linkCommerce.service.ConsumerScenarioStepOneService;
 import com.sztzjy.linkCommerce.service.ConsumerScenarioStepTwoService;
+import com.sztzjy.linkCommerce.service.ConsumerScenarioStepThreeService;
 import com.sztzjy.linkCommerce.service.StudentTrainingAnswerService;
 import com.sztzjy.linkCommerce.util.ResultEntity;
 import io.swagger.annotations.Api;
@@ -129,6 +132,9 @@ public class StudentTrainingAnswerController {
     @Autowired
     private ConsumerScenarioStepTwoService consumerScenarioStepTwoService;
 
+    @Autowired
+    private ConsumerScenarioStepThreeService consumerScenarioStepThreeService;
+
     @GetMapping("/{taskKey}")
     @ApiOperation("查询当前学生指定实训任务答案")
     public ResultEntity<StudentTrainingAnswer> detail(@PathVariable String taskKey,
@@ -355,6 +361,17 @@ public class StudentTrainingAnswerController {
         }
     }
 
+    @PostMapping("/consumer-scenario/step-3/validate")
+    @ApiOperation("消费场景解构第三步校验")
+    public ResultEntity<ConsumerScenarioStepThreeValidationResult> validateConsumerScenarioStepThree(
+            @RequestBody ConsumerScenarioStepThreeValidationRequest answer, HttpServletRequest request) {
+        try {
+            return new ResultEntity<>(HttpStatus.OK, "校验完成", consumerScenarioStepThreeService.validate(answer, TokenProvider.getJWTUser(request)));
+        } catch (ServiceException e) {
+            return new ResultEntity<>(e.getCode(), e.getMessage());
+        }
+    }
+
     @PostMapping(value = "/consumer-behavior/step-3/word-preview", consumes = "multipart/form-data")
     @ApiOperation("消费者需求与行为第三步Word预览")
     public ResultEntity<ConsumerBehaviorWordPreviewResult> previewConsumerBehaviorStepThreeWord(
diff --git a/src/main/java/com/sztzjy/linkCommerce/entity/dto/ConsumerScenarioStepThreeValidationRequest.java b/src/main/java/com/sztzjy/linkCommerce/entity/dto/ConsumerScenarioStepThreeValidationRequest.java
new file mode 100644
index 0000000..9d78cc2
--- /dev/null
+++ b/src/main/java/com/sztzjy/linkCommerce/entity/dto/ConsumerScenarioStepThreeValidationRequest.java
@@ -0,0 +1,13 @@
+package com.sztzjy.linkCommerce.entity.dto;
+
+public class ConsumerScenarioStepThreeValidationRequest {
+    private String journeyMapUrl;
+
+    public String getJourneyMapUrl() {
+        return journeyMapUrl;
+    }
+
+    public void setJourneyMapUrl(String journeyMapUrl) {
+        this.journeyMapUrl = journeyMapUrl;
+    }
+}
diff --git a/src/main/java/com/sztzjy/linkCommerce/entity/dto/ConsumerScenarioStepThreeValidationResult.java b/src/main/java/com/sztzjy/linkCommerce/entity/dto/ConsumerScenarioStepThreeValidationResult.java
new file mode 100644
index 0000000..1e259ab
--- /dev/null
+++ b/src/main/java/com/sztzjy/linkCommerce/entity/dto/ConsumerScenarioStepThreeValidationResult.java
@@ -0,0 +1,22 @@
+package com.sztzjy.linkCommerce.entity.dto;
+
+public class ConsumerScenarioStepThreeValidationResult {
+    private boolean valid;
+    private String message;
+
+    public boolean isValid() {
+        return valid;
+    }
+
+    public void setValid(boolean valid) {
+        this.valid = valid;
+    }
+
+    public String getMessage() {
+        return message;
+    }
+
+    public void setMessage(String message) {
+        this.message = message;
+    }
+}
diff --git a/src/main/java/com/sztzjy/linkCommerce/service/ConsumerScenarioStepThreeService.java b/src/main/java/com/sztzjy/linkCommerce/service/ConsumerScenarioStepThreeService.java
new file mode 100644
index 0000000..4f3c09b
--- /dev/null
+++ b/src/main/java/com/sztzjy/linkCommerce/service/ConsumerScenarioStepThreeService.java
@@ -0,0 +1,9 @@
+package com.sztzjy.linkCommerce.service;
+
+import com.sztzjy.linkCommerce.config.security.JwtUser;
+import com.sztzjy.linkCommerce.entity.dto.ConsumerScenarioStepThreeValidationRequest;
+import com.sztzjy.linkCommerce.entity.dto.ConsumerScenarioStepThreeValidationResult;
+
+public interface ConsumerScenarioStepThreeService {
+    ConsumerScenarioStepThreeValidationResult validate(ConsumerScenarioStepThreeValidationRequest request, JwtUser user);
+}
diff --git a/src/main/java/com/sztzjy/linkCommerce/service/impl/ConsumerScenarioStepThreeServiceImpl.java b/src/main/java/com/sztzjy/linkCommerce/service/impl/ConsumerScenarioStepThreeServiceImpl.java
new file mode 100644
index 0000000..9fe8e14
--- /dev/null
+++ b/src/main/java/com/sztzjy/linkCommerce/service/impl/ConsumerScenarioStepThreeServiceImpl.java
@@ -0,0 +1,34 @@
+package com.sztzjy.linkCommerce.service.impl;
+
+import com.sztzjy.linkCommerce.config.exception.handler.ServiceException;
+import com.sztzjy.linkCommerce.config.security.JwtUser;
+import com.sztzjy.linkCommerce.entity.dto.ConsumerScenarioStepThreeValidationRequest;
+import com.sztzjy.linkCommerce.entity.dto.ConsumerScenarioStepThreeValidationResult;
+import com.sztzjy.linkCommerce.service.ConsumerScenarioStepThreeService;
+import org.apache.commons.lang3.StringUtils;
+import org.springframework.http.HttpStatus;
+import org.springframework.stereotype.Service;
+
+@Service
+public class ConsumerScenarioStepThreeServiceImpl implements ConsumerScenarioStepThreeService {
+    @Override
+    public ConsumerScenarioStepThreeValidationResult validate(ConsumerScenarioStepThreeValidationRequest request, JwtUser user) {
+        requireStudent(user);
+        if (request == null || StringUtils.isBlank(request.getJourneyMapUrl())) {
+            throw new ServiceException(HttpStatus.BAD_REQUEST, "请上传用户购买旅程图");
+        }
+        ConsumerScenarioStepThreeValidationResult result = new ConsumerScenarioStepThreeValidationResult();
+        result.setValid(true);
+        result.setMessage("用户购买旅程图已上传。");
+        return result;
+    }
+
+    private void requireStudent(JwtUser user) {
+        if (user == null || StringUtils.isBlank(user.getUserId())) {
+            throw new ServiceException(HttpStatus.UNAUTHORIZED, "请先登录后再提交");
+        }
+        if (user.getRoleId() != 4) {
+            throw new ServiceException(HttpStatus.FORBIDDEN, "仅学生可以提交实训答案");
+        }
+    }
+}
diff --git a/src/test/java/com/sztzjy/linkCommerce/service/impl/ConsumerScenarioStepThreeServiceImplTest.java b/src/test/java/com/sztzjy/linkCommerce/service/impl/ConsumerScenarioStepThreeServiceImplTest.java
new file mode 100644
index 0000000..2f05164
--- /dev/null
+++ b/src/test/java/com/sztzjy/linkCommerce/service/impl/ConsumerScenarioStepThreeServiceImplTest.java
@@ -0,0 +1,46 @@
+package com.sztzjy.linkCommerce.service.impl;
+
+import com.sztzjy.linkCommerce.config.exception.handler.ServiceException;
+import com.sztzjy.linkCommerce.config.security.JwtUser;
+import com.sztzjy.linkCommerce.entity.dto.ConsumerScenarioStepThreeValidationRequest;
+import com.sztzjy.linkCommerce.entity.dto.ConsumerScenarioStepThreeValidationResult;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+class ConsumerScenarioStepThreeServiceImplTest {
+    private final ConsumerScenarioStepThreeServiceImpl service = new ConsumerScenarioStepThreeServiceImpl();
+
+    @Test
+    void acceptsUploadedJourneyMap() {
+        ConsumerScenarioStepThreeValidationRequest request = new ConsumerScenarioStepThreeValidationRequest();
+        request.setJourneyMapUrl("/profile/upload/journey-map.png");
+
+        ConsumerScenarioStepThreeValidationResult result = service.validate(request, student());
+
+        assertTrue(result.isValid());
+    }
+
+    @Test
+    void rejectsMissingJourneyMap() {
+        assertThrows(ServiceException.class, () -> service.validate(new ConsumerScenarioStepThreeValidationRequest(), student()));
+    }
+
+    @Test
+    void rejectsNonStudent() {
+        ConsumerScenarioStepThreeValidationRequest request = new ConsumerScenarioStepThreeValidationRequest();
+        request.setJourneyMapUrl("/profile/upload/journey-map.png");
+        JwtUser teacher = student();
+        teacher.setRoleId(3);
+
+        assertThrows(ServiceException.class, () -> service.validate(request, teacher));
+    }
+
+    private JwtUser student() {
+        JwtUser user = new JwtUser();
+        user.setUserId("stu-1");
+        user.setRoleId(4);
+        return user;
+    }
+}