diff --git a/models/request/book.go b/models/request/book.go
index 77eb7c2..201c03c 100644
--- a/models/request/book.go
+++ b/models/request/book.go
@@ -25,6 +25,7 @@ type AddBookRequest struct {
 	PageCount       int64    `form:"page_count"`                   // 页数
 	WordCount       int64    `form:"word_count"`                   // 字数
 	BookFormat      int64    `form:"book_format"`                  // 图书格式
+	CatID           string   `form:"cat_id"`                       // 类目ID JSON字符串
 	LiveImage       []string `form:"live_image"`                   // 图片
 }
 
diff --git a/service/book.go b/service/book.go
index 758f1ec..16ea0be 100644
--- a/service/book.go
+++ b/service/book.go
@@ -143,6 +143,21 @@ func (s *BookService) doBook(data systemReq.AddBookRequest) (int64, error) {
 		liveImage = datatypes.JSON("[]")
 	}
 	catIdByJson := datatypes.JSON(`{"xian_yu_cat_id": "", "kong_fu_zi_cat_id": "", "pin_duo_duo_cat_id": ""}`)
+	if data.CatID != "" {
+		var catObj map[string]string
+		if err := json.Unmarshal([]byte(data.CatID), &catObj); err == nil {
+			filtered := make(map[string]string)
+			for k, v := range catObj {
+				if strings.TrimSpace(v) != "" {
+					filtered[k] = v
+				}
+			}
+			if len(filtered) > 0 {
+				filteredBytes, _ := json.Marshal(filtered)
+				catIdByJson = filteredBytes
+			}
+		}
+	}
 
 	book := models.BookInfo{
 		Fid:             data.Fid,