diff --git a/src/main/java/com/project/classicpaper/application/impl/ClassicPaperSetApplicationServiceImpl.java b/src/main/java/com/project/classicpaper/application/impl/ClassicPaperSetApplicationServiceImpl.java
index 68fee9b..6f5a0d7 100644
--- a/src/main/java/com/project/classicpaper/application/impl/ClassicPaperSetApplicationServiceImpl.java
+++ b/src/main/java/com/project/classicpaper/application/impl/ClassicPaperSetApplicationServiceImpl.java
@@ -22,6 +22,7 @@ import com.project.classicpaper.domain.entity.ClassicCategoryEntity;
 import com.project.classicpaper.domain.service.*;
 import com.project.question.domain.entity.QuestionEntity;
 import com.project.question.domain.service.QuestionBaseService;
+import lombok.extern.slf4j.Slf4j;
 import org.apache.commons.lang3.StringUtils;
 import org.springframework.web.multipart.MultipartFile;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -34,6 +35,7 @@ import java.util.stream.Collectors;
 import com.fasterxml.jackson.databind.ObjectMapper;
 
 @Service
+@Slf4j
 public class ClassicPaperSetApplicationServiceImpl implements ClassicPaperSetApplicationService {
 
     @Autowired
@@ -63,9 +65,6 @@ public class ClassicPaperSetApplicationServiceImpl implements ClassicPaperSetApp
     @Autowired
     private ClassicCategoryBaseService classicCategoryBaseService;
 
-    @Autowired
-    private com.project.task.config.ExamScoreRatioConfig examScoreRatioConfig;
-
     @Override
     public Result<ClassicPaperSetDTO> generate(ClassicPaperSetDTO request) throws Exception {
         return generateClassicPaperDomainService.generate(request);
@@ -259,39 +258,39 @@ public class ClassicPaperSetApplicationServiceImpl implements ClassicPaperSetApp
     }
 
     /**
-     * 计算分值比例并填充到 DTO 的四个独立字段
-     * 优先取实体已存储的 scoreRatio JSON，否则从 ExamScoreRatioConfig 计算
-     * 题型数量为 0 时对应字段设为 null
+     * 从 scoreRatio JSON 解析分值比例并填充到 DTO 的四个独立字段
+     * 没有 scoreRatio 或解析失败时，不设值（前端自己处理）
      */
     private void computeScoreRatio(ClassicPaperSetEntity paperSet, ClassicPaperSetDTO dto) {
-        Map<String, Integer> ratioMap = null;
-        if (StrUtil.isNotBlank(paperSet.getScoreRatio())) {
-            try {
-                ratioMap = new ObjectMapper().readValue(paperSet.getScoreRatio(),
-                        Map.class);
-            } catch (Exception e) {
-                // 解析失败时使用配置默认值
-            }
+        if (StrUtil.isBlank(paperSet.getScoreRatio())) {
+            return;
         }
-        if (ratioMap == null) {
-            ratioMap = new LinkedHashMap<>();
+        Map<String, Integer> ratioMap;
+        try {
+            String scoreRatio = paperSet.getScoreRatio();
+            // DB 中存的是带转义符的 JSON 字符串，需先还原
+            scoreRatio = scoreRatio.replace("\\\"", "\"");
+            // 可能有外层引号，去掉
+            if (scoreRatio.startsWith("\"") && scoreRatio.endsWith("\"")) {
+                scoreRatio = scoreRatio.substring(1, scoreRatio.length() - 1);
+            }
+            ratioMap = new ObjectMapper().readValue(scoreRatio, Map.class);
+        } catch (Exception e) {
+            log.warn(">>> [经典套题] scoreRatio 解析失败, setId={}", paperSet.getId(), e);
+            return;
         }
 
-        dto.setSingleChoiceScoreRatio(
-                paperSet.getSingleChoiceNum() != null && paperSet.getSingleChoiceNum() > 0
-                        ? ratioMap.getOrDefault("single", examScoreRatioConfig.getSingle())
-                        : null);
-        dto.setMultipleChoiceScoreRatio(
-                paperSet.getMultipleChoiceNum() != null && paperSet.getMultipleChoiceNum() > 0
-                        ? ratioMap.getOrDefault("multiple", examScoreRatioConfig.getMultiple())
-                        : null);
-        dto.setTrueFalseScoreRatio(
-                paperSet.getTrueFalseNum() != null && paperSet.getTrueFalseNum() > 0
-                        ? ratioMap.getOrDefault("trueFalse", examScoreRatioConfig.getTrueFalse())
-                        : null);
-        dto.setShortAnswerScoreRatio(
-                paperSet.getShortAnswerNum() != null && paperSet.getShortAnswerNum() > 0
-                        ? ratioMap.getOrDefault("shortAnswer", examScoreRatioConfig.getShortAnswer())
-                        : null);
+        if (paperSet.getSingleChoiceNum() != null && paperSet.getSingleChoiceNum() > 0) {
+            dto.setSingleChoiceScoreRatio(ratioMap.get("single"));
+        }
+        if (paperSet.getMultipleChoiceNum() != null && paperSet.getMultipleChoiceNum() > 0) {
+            dto.setMultipleChoiceScoreRatio(ratioMap.get("multiple"));
+        }
+        if (paperSet.getTrueFalseNum() != null && paperSet.getTrueFalseNum() > 0) {
+            dto.setTrueFalseScoreRatio(ratioMap.get("trueFalse"));
+        }
+        if (paperSet.getShortAnswerNum() != null && paperSet.getShortAnswerNum() > 0) {
+            dto.setShortAnswerScoreRatio(ratioMap.get("shortAnswer"));
+        }
     }
 }