This machine integrates zigzag / lambdoid sewing and splicing, multi-function sewing machine. The switching mechanism is unique, can achieve 2 to 3 step 4 free switch, without receiving cam replacement, external disk can realize a multi effect, this machine has the reverse stitching function, toggle lever, left and right position to achieve the transformation, suitable for denim, fabrics, leather gloves synthetic leather, chiffon, etc., suitable for shoes, gloves, bags, sofa products, sporting goods, hats and other sewing materials.