diff --git a/ruoyi-modules/ruoyi-system/src/main/java/org/dromara/system/domain/bo/SysOssTextbookBo.java b/ruoyi-modules/ruoyi-system/src/main/java/org/dromara/system/domain/bo/SysOssTextbookBo.java
index 4edf61d..8a34b24 100644
--- a/ruoyi-modules/ruoyi-system/src/main/java/org/dromara/system/domain/bo/SysOssTextbookBo.java
+++ b/ruoyi-modules/ruoyi-system/src/main/java/org/dromara/system/domain/bo/SysOssTextbookBo.java
@@ -48,5 +48,7 @@ public class SysOssTextbookBo extends BaseEntity {
      */
     private Integer status;
 
+    private String orderByColumn;
+
 
 }
diff --git a/ruoyi-modules/ruoyi-system/src/main/java/org/dromara/system/service/impl/SysOssTextbookServiceImpl.java b/ruoyi-modules/ruoyi-system/src/main/java/org/dromara/system/service/impl/SysOssTextbookServiceImpl.java
index cdf8ed2..8033d34 100644
--- a/ruoyi-modules/ruoyi-system/src/main/java/org/dromara/system/service/impl/SysOssTextbookServiceImpl.java
+++ b/ruoyi-modules/ruoyi-system/src/main/java/org/dromara/system/service/impl/SysOssTextbookServiceImpl.java
@@ -108,18 +108,25 @@ public class SysOssTextbookServiceImpl implements ISysOssTextbookService {
                 ids.add(bo.getCatalogId());
                 w.in("ot.catalog_id", ids);
             });
-        if (ObjectUtil.isNotNull(bo.getParams().get("downloadDesc"))) {
-            wrapper.orderByDesc("ot.download_num");
-        } else if (ObjectUtil.isNotNull(bo.getParams().get("downloadAsc"))) {
-            wrapper.orderByAsc("ot.download_num");
-        } else if (ObjectUtil.isNotNull(bo.getParams().get("previewDesc"))) {
-            wrapper.orderByDesc("ot.preview_num");
-        } else if (ObjectUtil.isNotNull(bo.getParams().get("previewAsc"))) {
-            wrapper.orderByAsc("ot.preview_num");
-        } else if (ObjectUtil.isNotNull(bo.getParams().get("timeAsc"))) {
-            wrapper.orderByAsc("ot.create_time");
-        } else {
-            wrapper.orderByDesc("ot.create_time");
+        String orderByColumn = bo.getOrderByColumn();
+        switch (orderByColumn) {
+            case "downloadDesc":
+                wrapper.orderByDesc("ot.download_num");
+                break;
+            case "downloadAsc":
+                wrapper.orderByAsc("ot.download_num");
+                break;
+            case "previewDesc":
+                wrapper.orderByDesc("ot.preview_num");
+                break;
+            case "previewAsc":
+                wrapper.orderByAsc("ot.preview_num");
+                break;
+            case "timeAsc":
+                wrapper.orderByAsc("ot.create_time");
+                break;
+            default:
+                wrapper.orderByDesc("ot.create_time");
         }
         return wrapper;
     }