High-speed crochet machine is specially used to produce elastic and non-elastic, bra lace straps, garment straps and so on. The microcomputer crochet machine 600-B8 has an operating width of 600 mm. It uses crochet hook, and the worm gear box connected to the main shaft drives the flower drum and flower chain piece group to control the smooth movement of 8 weft bars and weave various webbings. According to production needs, the two weft bars can be driven by the rocker of the left auxiliary box. The two weft bars driven by the rocker of the 600B-widening device have a larger swing (up to 50mm) and can be used as special webbing. The pattern group is composed of involute chain blocks, which makes the crocheting function run at high speed, reduces the noise level, and reduces the vibration of the crocheting machine; The conventional model is 48 cycles, and 96 cycles are also optional.