This model is an upgraded product of GULI GL-0330S-D3. The machine adopts the connecting rod type feeding structure, which has good durability and balanced feeding. For the bulk-type sewing material and the medium-thickness sewing material with large submergence, the feeding amount of the upper and lower layers can be consistent during the sewing process. The built-in integrated computer control technology provides stable performance and strong anti-interference ability. The use of a large hook to reduce the number of bottom line changes, improve work efficiency: the use of fully automatic lubrication device to improve the service life of the machine. Optional voice broadcast, optional USB socket, optional new double action knife trimming structure, optional sealed bottom oil pan, automatic needle position, automatic needle number, automatic counting needle stitch, electronic wire clamp, A variety of intelligent sewing modes such as built-in automatic lfting foot are available. Suitable for sewing medium and thick materials, bags, leather, leather products, sofas, etc.