diff --git a/raw_material_dialog.py b/raw_material_dialog.py
index d143904..310c99f 100644
--- a/raw_material_dialog.py
+++ b/raw_material_dialog.py
@@ -470,17 +470,17 @@ class RawMaterialLibraryDialog(QDialog):
         self.load_table()
 
     def load_major_categories(self):
-        """加载主类目"""
+        """加载主类目 - 只显示数据库中实际存在的类目"""
         try:
             with self.get_conn() as conn:
                 cursor = conn.execute("SELECT DISTINCT category FROM fabrics WHERE category IS NOT NULL AND category != '' AND (is_deleted IS NULL OR is_deleted = 0)")
                 majors = set(row[0] for row in cursor.fetchall() if row[0])
-                majors.update({"布料", "辅料", "其他"})
 
                 self.major_combo.blockSignals(True)
                 self.major_combo.clear()
                 self.major_combo.addItem("全部类目")
-                self.major_combo.addItems(sorted(majors))
+                if majors:
+                    self.major_combo.addItems(sorted(majors))
                 self.major_combo.blockSignals(False)
         except:
             pass