This model is an upgraded product of Guli GL-0303S-D3. This model adopts a linkage type feeding structure, which has good durability and balanced feeding. It can achieve the same feeding amount for bulky sewing materials and medium thick sewing materials with high mobility during the sewing process. 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, including voice broadcast, USB port, new double action knife thread cutting structure, sealed bottom oil pan, automatic needle positioning, automatic needle count, automatic counting reverse needle sewing, electronic thread clamping, and automatic foot lifting. Suitable for sewing medium thick materials, bags, leather jackets, leather products, sofas, etc.