The machine introduces German advanced core technology and independently developed products. 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 intelligent stitch length system can realize advanced sewing techniques such as pattern stitching and micro stitch length knotting. Optional built-in automatic lfting foot, economical, affordable and beautiful. Optional sewing material thickness detection function solves the problem of dense needles when sewing over the steps, ensuring consistent stitch length. The use of a large rotary hook reduces the number of bottom line changes and improves work efficiency: the use of fully automatic lubrication devices improves the service life of the machine. With voice broadcast, USB socket, new double action knife trimming structure, sealed bottom oil pan, automatic needle position, automatic needle number, automatic counting needle stitching, electronic clamping line, automatic lfting foot and other intelligent Sewing mode. Suitable for sewing medium and thick materials, bags, leather, leather products, sofas, etc.