Adopting a poor gear structure, reverse feeding structure, and built-in winding machine, the operation is flexible, the operation is stable, the stitching and embroidery lines are neat and beautiful, and the maintenance is convenient. It is suitable for the production of embroidery, suits, women's clothing, bras, swimwear, children's clothing, other clothing, shoes, hats, gloves, leather goods, luggage and other industries. It can do straight sewing, curved sewing, splicing, three-step four point sewing on thin and medium thick materials. It is a multi variety and multi-purpose series of curved stitching industrial sewing machines.