diff --git a/src/main/java/com/sztzjy/linkCommerce/entity/dto/ProductDevelopmentFactorsStepOneValidationRequest.java b/src/main/java/com/sztzjy/linkCommerce/entity/dto/ProductDevelopmentFactorsStepOneValidationRequest.java
new file mode 100644
index 0000000..b2b6da0
--- /dev/null
+++ b/src/main/java/com/sztzjy/linkCommerce/entity/dto/ProductDevelopmentFactorsStepOneValidationRequest.java
@@ -0,0 +1,23 @@
+package com.sztzjy.linkCommerce.entity.dto;
+
+import java.util.List;
+
+public class ProductDevelopmentFactorsStepOneValidationRequest {
+    private List<Row> factors;
+
+    public List<Row> getFactors() { return factors; }
+    public void setFactors(List<Row> factors) { this.factors = factors; }
+
+    public static class Row {
+        private String dimension;
+        private String successAnalysis;
+        private String failedAnalysis;
+
+        public String getDimension() { return dimension; }
+        public void setDimension(String dimension) { this.dimension = dimension; }
+        public String getSuccessAnalysis() { return successAnalysis; }
+        public void setSuccessAnalysis(String successAnalysis) { this.successAnalysis = successAnalysis; }
+        public String getFailedAnalysis() { return failedAnalysis; }
+        public void setFailedAnalysis(String failedAnalysis) { this.failedAnalysis = failedAnalysis; }
+    }
+}
diff --git a/src/main/java/com/sztzjy/linkCommerce/entity/dto/ProductDevelopmentFactorsStepOneValidationResult.java b/src/main/java/com/sztzjy/linkCommerce/entity/dto/ProductDevelopmentFactorsStepOneValidationResult.java
new file mode 100644
index 0000000..446d0fb
--- /dev/null
+++ b/src/main/java/com/sztzjy/linkCommerce/entity/dto/ProductDevelopmentFactorsStepOneValidationResult.java
@@ -0,0 +1,11 @@
+package com.sztzjy.linkCommerce.entity.dto;
+
+public class ProductDevelopmentFactorsStepOneValidationResult {
+    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/ProductDevelopmentFactorsStepOneService.java b/src/main/java/com/sztzjy/linkCommerce/service/ProductDevelopmentFactorsStepOneService.java
new file mode 100644
index 0000000..cb5e23c
--- /dev/null
+++ b/src/main/java/com/sztzjy/linkCommerce/service/ProductDevelopmentFactorsStepOneService.java
@@ -0,0 +1,9 @@
+package com.sztzjy.linkCommerce.service;
+
+import com.sztzjy.linkCommerce.config.security.JwtUser;
+import com.sztzjy.linkCommerce.entity.dto.ProductDevelopmentFactorsStepOneValidationRequest;
+import com.sztzjy.linkCommerce.entity.dto.ProductDevelopmentFactorsStepOneValidationResult;
+
+public interface ProductDevelopmentFactorsStepOneService {
+    ProductDevelopmentFactorsStepOneValidationResult validate(ProductDevelopmentFactorsStepOneValidationRequest request, JwtUser user);
+}
diff --git a/src/main/java/com/sztzjy/linkCommerce/service/impl/ProductDevelopmentFactorsStepOneServiceImpl.java b/src/main/java/com/sztzjy/linkCommerce/service/impl/ProductDevelopmentFactorsStepOneServiceImpl.java
new file mode 100644
index 0000000..9aaa939
--- /dev/null
+++ b/src/main/java/com/sztzjy/linkCommerce/service/impl/ProductDevelopmentFactorsStepOneServiceImpl.java
@@ -0,0 +1,61 @@
+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.ProductDevelopmentFactorsStepOneValidationRequest;
+import com.sztzjy.linkCommerce.entity.dto.ProductDevelopmentFactorsStepOneValidationResult;
+import com.sztzjy.linkCommerce.service.ProductDevelopmentFactorsStepOneService;
+import org.apache.commons.lang3.StringUtils;
+import org.springframework.http.HttpStatus;
+import org.springframework.stereotype.Service;
+
+import java.util.Arrays;
+import java.util.LinkedHashSet;
+import java.util.Set;
+
+@Service
+public class ProductDevelopmentFactorsStepOneServiceImpl implements ProductDevelopmentFactorsStepOneService {
+    private static final Set<String> DIMENSIONS = new LinkedHashSet<>(Arrays.asList(
+            "用户需求真实性", "产品体验闭环", "生态与兼容"));
+
+    @Override
+    public ProductDevelopmentFactorsStepOneValidationResult validate(ProductDevelopmentFactorsStepOneValidationRequest request, JwtUser user) {
+        requireStudent(user);
+        if (request == null || request.getFactors() == null || request.getFactors().size() != DIMENSIONS.size()) {
+            throw badRequest("请完成用户需求真实性、产品体验闭环和生态与兼容分析");
+        }
+        Set<String> submittedDimensions = new LinkedHashSet<>();
+        for (ProductDevelopmentFactorsStepOneValidationRequest.Row row : request.getFactors()) {
+            String dimension = row == null ? "" : StringUtils.trimToEmpty(row.getDimension());
+            if (!DIMENSIONS.contains(dimension) || !submittedDimensions.add(dimension)) {
+                throw badRequest("提交的分析维度不完整或重复");
+            }
+            if (!StringUtils.isNotBlank(row.getSuccessAnalysis())) {
+                throw badRequest("请填写" + dimension + "的成功产品分析");
+            }
+            if (!StringUtils.isNotBlank(row.getFailedAnalysis())) {
+                throw badRequest("请填写" + dimension + "的失败产品分析");
+            }
+        }
+        if (!submittedDimensions.equals(DIMENSIONS)) {
+            throw badRequest("请完成用户需求真实性、产品体验闭环和生态与兼容分析");
+        }
+        ProductDevelopmentFactorsStepOneValidationResult result = new ProductDevelopmentFactorsStepOneValidationResult();
+        result.setValid(true);
+        result.setMessage("校验通过");
+        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, "仅学生可提交实训答案");
+        }
+    }
+
+    private ServiceException badRequest(String message) {
+        return new ServiceException(HttpStatus.BAD_REQUEST, message);
+    }
+}
diff --git a/src/test/java/com/sztzjy/linkCommerce/service/impl/ProductDevelopmentFactorsStepOneServiceImplTest.java b/src/test/java/com/sztzjy/linkCommerce/service/impl/ProductDevelopmentFactorsStepOneServiceImplTest.java
new file mode 100644
index 0000000..85a8506
--- /dev/null
+++ b/src/test/java/com/sztzjy/linkCommerce/service/impl/ProductDevelopmentFactorsStepOneServiceImplTest.java
@@ -0,0 +1,79 @@
+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.ProductDevelopmentFactorsStepOneValidationRequest;
+import com.sztzjy.linkCommerce.entity.dto.ProductDevelopmentFactorsStepOneValidationResult;
+import org.junit.jupiter.api.Test;
+
+import java.util.Arrays;
+
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+class ProductDevelopmentFactorsStepOneServiceImplTest {
+
+    @Test
+    void acceptsStudentWithAllThreeCompleteFactorAnalyses() {
+        ProductDevelopmentFactorsStepOneServiceImpl service = new ProductDevelopmentFactorsStepOneServiceImpl();
+
+        ProductDevelopmentFactorsStepOneValidationResult result = service.validate(validRequest(), student());
+
+        assertTrue(result.isValid());
+    }
+
+    @Test
+    void rejectsBlankOrForgedFactorAnalyses() {
+        ProductDevelopmentFactorsStepOneServiceImpl service = new ProductDevelopmentFactorsStepOneServiceImpl();
+
+        ProductDevelopmentFactorsStepOneValidationRequest blankAnalysis = validRequest();
+        blankAnalysis.getFactors().get(1).setFailedAnalysis("  ");
+        assertThrows(ServiceException.class, () -> service.validate(blankAnalysis, student()));
+
+        ProductDevelopmentFactorsStepOneValidationRequest duplicateDimension = validRequest();
+        duplicateDimension.getFactors().get(2).setDimension("用户需求真实性");
+        assertThrows(ServiceException.class, () -> service.validate(duplicateDimension, student()));
+
+        ProductDevelopmentFactorsStepOneValidationRequest forgedDimension = validRequest();
+        forgedDimension.getFactors().get(2).setDimension("技术应用");
+        assertThrows(ServiceException.class, () -> service.validate(forgedDimension, student()));
+    }
+
+    @Test
+    void rejectsNonStudent() {
+        ProductDevelopmentFactorsStepOneServiceImpl service = new ProductDevelopmentFactorsStepOneServiceImpl();
+
+        assertThrows(ServiceException.class, () -> service.validate(validRequest(), teacher()));
+    }
+
+    private ProductDevelopmentFactorsStepOneValidationRequest validRequest() {
+        ProductDevelopmentFactorsStepOneValidationRequest request = new ProductDevelopmentFactorsStepOneValidationRequest();
+        request.setFactors(Arrays.asList(
+                row("用户需求真实性", "解决高频付费痛点", "没有真实需求"),
+                row("产品体验闭环", "操作简单且反馈明确", "操作复杂且不稳定"),
+                row("生态与兼容", "兼容主流生态", "无法接入平台")));
+        return request;
+    }
+
+    private ProductDevelopmentFactorsStepOneValidationRequest.Row row(String dimension, String successAnalysis, String failedAnalysis) {
+        ProductDevelopmentFactorsStepOneValidationRequest.Row row = new ProductDevelopmentFactorsStepOneValidationRequest.Row();
+        row.setDimension(dimension);
+        row.setSuccessAnalysis(successAnalysis);
+        row.setFailedAnalysis(failedAnalysis);
+        return row;
+    }
+
+    private JwtUser student() {
+        JwtUser user = new JwtUser();
+        user.setUserId("stu-1");
+        user.setRoleId(4);
+        return user;
+    }
+
+    private JwtUser teacher() {
+        JwtUser user = new JwtUser();
+        user.setUserId("teacher-1");
+        user.setRoleId(2);
+        return user;
+    }
+}