This machine adopts a linkage type feeding mechanism, which has good durability and balanced feeding. It can achieve consistent feeding of upper and lower layers during the sewing process for bulky sewing materials and medium thick sewing materials with high mobility. The use of built-in servo motors directly drives the machine, achieving fast start-up and precise braking; At the same time, advanced integrated computer control technology is adopted, 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 improve the service life of the machine. It has multiple intelligent sewing modes such as automatic needle positioning, automatic needle counting, automatic counting reverse sewing, automatic thread cutting, electronic thread clamping, and automatic foot lifting. Suitable for sewing medium thick materials, bags, leather jackets, leather products, etc.