Suitable for various types of clothing (such as suits, jeans, workwear, fashion, coats, etc.), including size knotting, buttonhole reinforcement, waistband knotting, and nailing high marks. Adopting a simple and reliable double V-belt reduction mechanism has improved reliability and service life. The design of the large feeding cam reduces the impact at the turning point, and various stitches can be sewn by changing the feeding cam.