The sewing machine is mainly a machine that uses a sewing thread to form a line on the seam to make one or more layers of stitches interwoven or stitched up. Usually divided into thin materials and thick materials two uses, flat seam function sewing cotton, hemp, silk, wool, artificial fiber and other fabrics and leather, plastic, paper and other products, thin materials are generally used in knitting, underwear, shirts, uniforms, etc., thick materials are generally used in various types of sportswear, jeans, fashion, coats, shoes and hats, Picha, bags, Flat sewing machine in sewing equipment is the most basic car species, in the sewing, is the simplest line, sewn out of the line neat and beautiful, uniform line, smooth and firm, sewing speed, easy to operate, easy to understand to use. The maximum sewing speed is 4000-5000rpm.