Fabric feeding mechanism: The needle bar swing mechanism adopts a stepper motor with a disassembly capacity of up to 0.05mm, making the sewing thread stable and beautiful. The slow start function can be achieved by setting the speed of the first five needles through the operation panel, which can effectively prevent wire breakage when the machine starts at high speed. Electronic control can be used to reinforce the seams during the final few stitches to prevent buttonholes from coming loose. By adjusting the tension of the electromagnetic wire clamp, different tension requirements can be achieved for the parallel and sleeve joints in the buttonhole.