This machine has introduced advanced core technology from Germany and independently developed the latest varieties. It adopts a connecting rod feeding mechanism with good durability and balanced feeding. It can achieve consistent feeding volume for bulky and medium thick sewing materials during the sewing process. It is equipped with a roller edge rolling device and a pneumatic rear cutter device, which can be computer-controlled to retain the length and distance of the roller according to actual needs. 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 count, automatic counting reverse sewing, and automatic thread cutting. Suitable for sewing medium thick materials, bags, leather jackets, leather products, etc.