The JDF-822 model is a new model with professional improvement and innovation based on the ZW300. It has been comprehensively improved and strengthened in terms of warp-off, opening, coiling, transmission system and stability of the whole machine. It has high-speed, stable and continuous operation capabilities. It has better performance in the production of weaving light, thin and medium-density fabrics, and the product has a wider range of applications. This model can be equipped with single/double pump single-jet, double-jet, triple-jet or four-jet electronic free weft selection system, cam opening device and dobby opening device.