Yongji double-sided Knitting machine has been active in the market for more than 20 years. As a hot-selling model of Yongji, its accuracy is one of its major features. When assembling the roundness and flatness, we pay special attention to the accuracy of self-rounding and self-leveling of the upper and lower Syringe and the same circle and same level. The adjustment value of each grid is 0.025 MM, which shows that the machine can achieve basically no shadow on the cloth surface when running. The effect of horizontal strips and thin strips. The speed of 34X84 and 34X96 models can reach 15-24rpm, showing Yongji's high standards for machine technical difficulty.