diff --git a/fruitshorts-module-content/src/main/java/com/fruitshorts/content/service/DramaService.java b/fruitshorts-module-content/src/main/java/com/fruitshorts/content/service/DramaService.java
index d7d1450..24e17b2 100644
--- a/fruitshorts-module-content/src/main/java/com/fruitshorts/content/service/DramaService.java
+++ b/fruitshorts-module-content/src/main/java/com/fruitshorts/content/service/DramaService.java
@@ -92,7 +92,7 @@ public class DramaService {
 
     private Long insert(DramaSaveReqVO req, Long operatorId, Long creatorId) {
         Drama drama = new Drama();
-        apply(drama, req);
+        apply(drama, req, true);
         drama.setCode(generateCode());
         drama.setStatus(ContentStatus.DRAFT.getCode());
         drama.setCreatorId(creatorId == null ? 0L : creatorId);
@@ -109,7 +109,7 @@ public class DramaService {
     @Transactional(rollbackFor = Exception.class)
     public void update(Long id, DramaSaveReqVO req) {
         Drama drama = getExisting(id);
-        apply(drama, req);
+        apply(drama, req, false);
         if (req.getFavoriteCount() != null) {
             drama.setFavoriteCount(nonNegative(req.getFavoriteCount(), "收藏数"));
         }
@@ -345,21 +345,50 @@ public class DramaService {
         }
     }
 
-    private void apply(Drama drama, DramaSaveReqVO req) {
+    /**
+     * 字段映射。新建时（isNew=true）缺省字段按默认值补齐；
+     * 更新时只覆盖请求里显式传入的字段，漏传的字段保持库里原值，
+     * 避免编辑表单没带 sort / language / trailerUrl 时把已有数据清掉。
+     */
+    private void apply(Drama drama, DramaSaveReqVO req, boolean isNew) {
         drama.setTitle(req.getTitle());
-        drama.setSubtitle(req.getSubtitle() == null ? "" : req.getSubtitle());
-        DramaMultiTagSupport.applyCategoryIds(drama, req);
-        drama.setGenre(req.getGenre() == null ? "" : req.getGenre());
-        drama.setSynopsis(req.getDescription() == null ? "" : req.getDescription());
-        drama.setCoverUrl(req.getCover() == null ? "" : req.getCover());
-        drama.setTrailerUrl(req.getTrailerUrl() == null ? "" : req.getTrailerUrl());
+        if (isNew || req.getSubtitle() != null) {
+            drama.setSubtitle(req.getSubtitle() == null ? "" : req.getSubtitle());
+        }
+        if (isNew || req.getCategoryIds() != null || req.getCategoryId() != null) {
+            DramaMultiTagSupport.applyCategoryIds(drama, req);
+        }
+        if (isNew || req.getGenre() != null) {
+            drama.setGenre(req.getGenre() == null ? "" : req.getGenre());
+        }
+        if (isNew || req.getDescription() != null) {
+            drama.setSynopsis(req.getDescription() == null ? "" : req.getDescription());
+        }
+        if (isNew || req.getCover() != null) {
+            drama.setCoverUrl(req.getCover() == null ? "" : req.getCover());
+        }
+        if (isNew || req.getTrailerUrl() != null) {
+            drama.setTrailerUrl(req.getTrailerUrl() == null ? "" : req.getTrailerUrl());
+        }
         drama.setHorizontalCoverUrl(drama.getHorizontalCoverUrl() == null ? "" : drama.getHorizontalCoverUrl());
-        drama.setLanguage(req.getLanguage() == null ? "zh-CN" : req.getLanguage());
-        DramaMultiTagSupport.applyDramaTypes(drama, req);
-        drama.setFreeEpisodes(req.getFreeEpisodes() == null ? 3 : req.getFreeEpisodes());
-        drama.setUnlockCoin(req.getUnlockCoin() == null ? 0 : req.getUnlockCoin());
-        drama.setIsHot(Boolean.TRUE.equals(req.getIsHot()) ? 1 : 0);
-        drama.setSort(req.getSort() == null ? 0 : req.getSort());
+        if (isNew || req.getLanguage() != null) {
+            drama.setLanguage(req.getLanguage() == null ? "zh-CN" : req.getLanguage());
+        }
+        if (isNew || req.getDramaTypes() != null || req.getDramaType() != null) {
+            DramaMultiTagSupport.applyDramaTypes(drama, req);
+        }
+        if (isNew || req.getFreeEpisodes() != null) {
+            drama.setFreeEpisodes(req.getFreeEpisodes() == null ? 3 : req.getFreeEpisodes());
+        }
+        if (isNew || req.getUnlockCoin() != null) {
+            drama.setUnlockCoin(req.getUnlockCoin() == null ? 0 : req.getUnlockCoin());
+        }
+        if (isNew || req.getIsHot() != null) {
+            drama.setIsHot(Boolean.TRUE.equals(req.getIsHot()) ? 1 : 0);
+        }
+        if (isNew || req.getSort() != null) {
+            drama.setSort(req.getSort() == null ? 0 : req.getSort());
+        }
     }
 
     private String generateCode() {