diff --git a/web/service/srv_playlet/playlet.go b/web/service/srv_playlet/playlet.go
index 024d3e4..70a4f59 100644
--- a/web/service/srv_playlet/playlet.go
+++ b/web/service/srv_playlet/playlet.go
@@ -1613,16 +1613,66 @@ func normalizeSeoValue(seo pubdef.SeoValue) pubdef.SeoValue {
 	return seo
 }
 
+// mergePlayletSeoDescription 把管理员自定义的 SEO 描述和自动模板拼在一起。
+// 规则:
+//   - custom 为空 → 返回 autoDesc
+//   - custom 已经包含当前版本的 autoDesc → 直接返回 custom，不重复追加
+//   - custom 结尾带有旧版本的「黄豆短剧《…》…免费高清持续更新。」模板
+//     (集数/剧名变更后产生的历史尾部) → 剥离旧尾部再拼接新模板
+//   - 其它情况 → custom + autoDesc
+func mergePlayletSeoDescription(custom, autoDesc string) string {
+	custom = strings.TrimSpace(custom)
+	autoDesc = strings.TrimSpace(autoDesc)
+	if custom == "" {
+		return autoDesc
+	}
+	if autoDesc == "" {
+		return custom
+	}
+	if strings.Contains(custom, autoDesc) {
+		return custom
+	}
+	if idx := strings.LastIndex(custom, "黄豆短剧《"); idx >= 0 && strings.HasSuffix(custom, "免费高清持续更新。") {
+		prefix := strings.TrimSpace(custom[:idx])
+		if prefix == "" {
+			return autoDesc
+		}
+		return prefix + autoDesc
+	}
+	return custom + autoDesc
+}
+
+// stripPlayletSeoAutoTemplate 从 SeoInfo.Description 中剥离自动模板部分，只保留管理员自定义。
+// 用于把展示用的 merged 字符串回写成「纯自定义」存库。
+func stripPlayletSeoAutoTemplate(merged, autoDesc string) string {
+	merged = strings.TrimSpace(merged)
+	autoDesc = strings.TrimSpace(autoDesc)
+	if merged == "" || autoDesc == "" {
+		return merged
+	}
+	if merged == autoDesc {
+		return ""
+	}
+	if strings.HasSuffix(merged, autoDesc) {
+		return strings.TrimSpace(strings.TrimSuffix(merged, autoDesc))
+	}
+	if idx := strings.LastIndex(merged, "黄豆短剧《"); idx >= 0 && strings.HasSuffix(merged, "免费高清持续更新。") {
+		return strings.TrimSpace(merged[:idx])
+	}
+	return merged
+}
+
 func applyPlayletDescription(doc *playletmod.Playlet) {
 	if doc == nil {
 		return
 	}
-	description := playletmod.BuildPlayletDescription(doc.PlayName, doc.Title, doc.TotalEpisode)
-	if description == "" {
+	autoDesc := playletmod.BuildPlayletDescription(doc.PlayName, doc.Title, doc.TotalEpisode)
+	if autoDesc == "" {
 		return
 	}
-	doc.Description = description
-	doc.SeoInfo.Description = description
+	// SeoInfo.Description 存纯自定义(用户没传时为空)；Playlet.Description 存合并后的展示值。
+	doc.SeoInfo.Description = stripPlayletSeoAutoTemplate(doc.SeoInfo.Description, autoDesc)
+	doc.Description = mergePlayletSeoDescription(doc.SeoInfo.Description, autoDesc)
 }
 
 func applyPlayletDescriptionOnUpdate(exist *playletmod.Playlet, req *proto.PlayletUpdateReq, setDoc bson.M) {
@@ -1641,11 +1691,10 @@ func applyPlayletDescriptionOnUpdate(exist *playletmod.Playlet, req *proto.Playl
 	if req.TotalEpisode != nil {
 		totalEpisode = *req.TotalEpisode
 	}
-	description := playletmod.BuildPlayletDescription(playName, title, totalEpisode)
-	if description == "" {
+	autoDesc := playletmod.BuildPlayletDescription(playName, title, totalEpisode)
+	if autoDesc == "" {
 		return
 	}
-	setDoc[playletmod.FN.Playlet.Description] = description
 	seo := exist.SeoInfo
 	if req.SeoInfo != nil {
 		if current, ok := setDoc["seoInfo"].(pubdef.SeoValue); ok {
@@ -1655,8 +1704,11 @@ func applyPlayletDescriptionOnUpdate(exist *playletmod.Playlet, req *proto.Playl
 		}
 	}
 	seo = normalizeSeoValue(seo)
-	seo.Description = description
+	// 剥离历史/当前版本的自动模板,仅保留纯自定义部分落到 SeoInfo.Description。
+	seo.Description = stripPlayletSeoAutoTemplate(seo.Description, autoDesc)
 	setDoc["seoInfo"] = seo
+	// Playlet.Description = 自定义 + 自动模板,供前台 SEO 页面渲染。
+	setDoc[playletmod.FN.Playlet.Description] = mergePlayletSeoDescription(seo.Description, autoDesc)
 }
 
 func playletToWebResp(item *playletmod.Playlet, themeNameMap map[int64]string, tagNameMap map[int64]string, categoryId *int64) *proto.PlayletListResp {