This model is an upgraded product of Guli GL-0330S-D3. This model adopts a linkage type feeding structure, 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. 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. Equipped with optional voice broadcast, USB port, new dual action knife thread cutting structure, sealed bottom oil pan, automatic needle positioning, automatic needle count, automatic counting reverse needle sewing, electronic thread clamping, built-in automatic lifting foot and other intelligent sewing modes. Suitable for sewing medium thick materials, bags, leather jackets, leather products, sofas, etc.