The high-speed lockstitch sewing machine has elegant shape, smooth lines, mature structure, reliable performance, high speed and efficiency, large operating space, and can sew thin, medium and thick sewing materials, with neat and beautiful stitches.   Reasonable mechanism ensures that there is no wrinkle when the seam is thin, and the thread is continuous when the seam is thick. The strong injection lubrication system makes the sewing performance of the machine stable and low noise when it is running at high speed.