6.7%。Sugarcane cutting was analyzed with the currency finity cell analysis software ANSYS, and distinguish standard of single base cutter on the bad incision state has been worked out by means of finity cell. Through physical simulative experiment, distinguish standard of broken root by base cutter's pressing was formulated. Simulative kinematics analysis of cutting sugarcane continuously has been carried out by using the dynamics analysis software ADAMS, and the quantity study on affecting factors and interactive effect on the rate of broken biennial root was done. The results showed that the combination of low frequency and low speed ratio, low amplitude and few razor blades are beneficial in reducing the rate of broken biennial root. Under the combination of factors (amplitude and frequency is zero, speed ratio X1=24, obliquity of base cutter X4=15°, the number of razor blades X5=2), the rate of broken biennial root is 6.7%. 