The outline of such machinery are internationally popular. The structures of such machinery have adopted the internationally-advanced technology and feature superior performances, strong practicability, stable sewing and simple maintenance. The highest sewing speed reaches 6500 R. P. M. The sewing performance is stable, light movement, low noise, small shaking and the rotation is smooth and soft. They are applicable to the sewing of thin and medium-thick textiles. As required by users, three-thread, four-thread and five-thread machine types are available.