diff --git a/business-css/src/main/java/com/yfd/business/css/controller/AlgorithmModelController.java b/business-css/src/main/java/com/yfd/business/css/controller/AlgorithmModelController.java
index 7d87cc0..a973245 100644
--- a/business-css/src/main/java/com/yfd/business/css/controller/AlgorithmModelController.java
+++ b/business-css/src/main/java/com/yfd/business/css/controller/AlgorithmModelController.java
@@ -113,7 +113,7 @@ public class AlgorithmModelController {
         }
         if (versionTag != null && !versionTag.isEmpty()) qw.eq("version_tag", versionTag);
         if (isCurrent != null && !isCurrent.isEmpty()) qw.eq("is_current", isCurrent);
-        qw.orderByDesc("updated_at");
+        qw.orderByDesc("is_current").orderByDesc("updated_at");
         Page<AlgorithmModel> page = new Page<>(pageNum, pageSize, true);
         return algorithmModelService.page(page, qw);
     }
diff --git a/business-css/src/main/java/com/yfd/business/css/controller/MaterialController.java b/business-css/src/main/java/com/yfd/business/css/controller/MaterialController.java
index e6590b9..d9583e5 100644
--- a/business-css/src/main/java/com/yfd/business/css/controller/MaterialController.java
+++ b/business-css/src/main/java/com/yfd/business/css/controller/MaterialController.java
@@ -146,13 +146,14 @@ public class MaterialController {
     @PreAuthorize("hasAuthority('material:export')")
     @Log(value = "导出物料", module = "物料管理")
     @GetMapping("/export")
-    public ResponseEntity<byte[]> exportMaterialsV2(@RequestParam String projectId,
+    public ResponseEntity<byte[]> exportMaterialsV2(@RequestParam(required = false) String projectId,
                                                     @RequestParam(required = false) List<String> ids,
                                                     @RequestParam(required = false) String nameLike) {
-        if (projectId != null && !projectId.isBlank() && !"-1".equals(projectId)) {
-            projectAccessHelper.assertCanReadProject(projectId);
+        String pid = (projectId == null || projectId.isBlank()) ? "-1" : projectId;
+        if (!"-1".equals(pid)) {
+            projectAccessHelper.assertCanReadProject(pid);
         }
-        byte[] bytes = materialService.exportMaterialsV2(projectId, ids, nameLike);
+        byte[] bytes = materialService.exportMaterialsV2(pid, ids, nameLike);
         String fn = "materials.xlsx";
         return ResponseEntity.ok()
                 .header(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=" + fn)