The invention relates to a molding element and a double-color molding method of the molding element. The molding element comprises a first injection part and a second injection part. The first injection part and the second injection part are inserted in a body through the injection molding technology. The first injection part comprises a main body and a through-groove passing through the main body. The second injection part comprises a body and an embedding part. The embedding part is convexly arranged on one surface of the body and inserted in the through-groove of the first injection part, and a concave groove surrounding the embedding part is formed. The invention also provides the double-color molding method of the molding element.