diff --git a/internal/infra/models/pig.go b/internal/infra/models/pig.go
index 037b507..8042528 100644
--- a/internal/infra/models/pig.go
+++ b/internal/infra/models/pig.go
@@ -45,6 +45,11 @@ func (PigBatch) TableName() string {
 	return "pig_batches"
 }
 
+// IsActive 判断猪批次是否处于活跃状态
+func (pb PigBatch) IsActive() bool {
+	return pb.Status != BatchStatusSold && pb.Status != BatchStatusArchived
+}
+
 // LogChangeType 定义了猪批次数量变更的类型
 type LogChangeType string