1. Microcomputer crochet machine 900-B3 has an operating width of 900 mm, uses crochet hook, and is equipped with 2 weft bars and 1 Elastic yarn bayonet bar BPE, all bars driven by a weft shift device TRR.3L with 3 braces. 2. The 2 weft bars are driven by the 2 side braces of the weft shifting device, and the lateral shift is up to 60 mm, while the elastic yarn spout comb The ctenet is driven by the center stay of the weft shift device. 3. Driven by the rocker of the left sub-box, the three weft bars are driven to move smoothly and weave various webbing. The equipment adopts a microcomputer control system, which is convenient for managing the main functions of the machine and controlling production data. 4. The warp let-off, yarn feed, bottom line feed, weft feed, and belt weft density of the equipment all adopt electronic data control system, which can adjust the required data arbitrarily, without manual replacement of gears, maintenance-free, and convenient operation. 5. It can edit patterns and corrects on the machine more conveniently and quickly. 6. The handwheel of the device adopts electronic handwheel, which is easy to operate, flexible, labor-saving and simple. High-speed crocheting machine is specially used to produce elastic and inelastic flat belts.