This model adopts a linkage type feeding structure, which has good durability and balanced feeding. It can make the upper and lower layers smooth during the sewing process for bulky sewing materials and medium thick sewing materials with high mobility The feeding volume has reached consistency. Using built-in integrated computer control technology, with stable performance and strong anti-interference ability. Using a large rotary shuttle to reduce the number of bottom line changes and improve work efficiency: adopting a fully automatic lubrication device to extend the service life of the machine. It has multiple intelligent sewing modes such as automatic needle positioning, automatic needle counting, automatic reverse needle sewing, automatic thread cutting, electronic thread clamping, automatic lifting foot and lifting and dragging cloth wheel device. Suitable for sewing medium thick materials, bags, leather jackets, leather products, sofas, etc.