diff --git a/op_array/util.go b/op_array/util.go
index 2c3627b..0137d0f 100644
--- a/op_array/util.go
+++ b/op_array/util.go
@@ -72,6 +72,16 @@ func Group[Key comparable, Value any](dataList []Value, keyFormat func(item Valu
 	return res
 }
 
+// GroupToMap 数组数据按照指定 key 进行分组
+func GroupToMap[Key comparable, Value any](dataList []Value, keyFormat func(item Value) Key) map[Key][]Value {
+	dataTable := make(map[Key][]Value)
+	for _, item := range dataList {
+		key := keyFormat(item)
+		dataTable[key] = append(dataTable[key], item)
+	}
+	return dataTable
+}
+
 // TreeItem 数据结构
 type TreeItem[ID comparable, Value any] struct {
 	ID        ID                     `json:"id" dc:"数据ID"`