High-speed platform stitching machine is a sewing equipment for knitted garments. It is mainly suitable for processing various kinds of knitted underwear. It is equipped with automatic lifting foot and automatic cutting up and down. With less investment, the production efficiency has been significantly improved. As long as the pedal is stepped back, the electric tangential knife can be simply operated, and the needle, bending needle and feeding needle (upper fork needle) can be cut off quickly.