diff --git a/shipment/admin.py b/shipment/admin.py
index 7283842..62afb87 100644
--- a/shipment/admin.py
+++ b/shipment/admin.py
@@ -38,10 +38,17 @@ class ShipmentAdmin(admin.ModelAdmin):
 
 @admin.register(SalesItem)
 class SalesItemAdmin(admin.ModelAdmin):
-    list_display = ['id', 'name', 'quantity', 'unit', 'shipment', 'printing_job_id', 'customer_id', 'created_by', 'created_at']
-    list_filter = ['unit', 'created_at']
+    list_display = ['id', 'name', 'quantity', 'unit', 'shipment_status', 'printing_job_id', 'customer_id', 'created_by', 'created_at']
+    list_filter = ['unit', 'created_at', ('shipment', admin.EmptyFieldListFilter)]
     search_fields = ['name', 'shipment__customer__name']
     readonly_fields = ['created_at', 'updated_at', 'created_by']
+    raw_id_fields = ['shipment']
+    
+    def shipment_status(self, obj):
+        if obj.shipment:
+            return f'出货单 #{obj.shipment.id}'
+        return '待分配'
+    shipment_status.short_description = '出货单'
     
     def save_model(self, request, obj, form, change):
         if not change: