This machine integrates oerseam with coverstitch process automatical ly complete the process of covering and stretching seam, three-nee dle with five-thread overlock sewing, which can automatically trim and fold edges, sew and receive materials, the stitches and sewing lines are beautiful, smooth and efficient. The machine has double head structure of overlock sewing and flat lock machine equipped with edge winding guiding mechanism, automatic thread cutting and receiving, size standard, automatic sewing. Automatic cutting, infrared position ing. One- Button operation, simple and easy operation.