Abstract: The planting area of pear orchard and fruit production in China is at the top in the world, and the pear industry has significant economic position in China.According to scientific plant method, it is sometimes necessary to prune the tree to allow accumulated nutrients in the winter.In recent years, artificial pruning and mechanical pruning are widely used in fruit production, but the late development of orchard cutting device and the relatively low level of mechanization have increased the field management workload.Pear branch belongs to the anisotropy compound material, and it has high-hardness, high-intention.So the selection of cutting technological parameters is very important, and the parementers influenced cutting quality and efficiency.In order to further study the cutting technique, the cutting testbed was designed.The testbed was consisted of a accurate micro-controlled electronic universal testing machine, a self-made cutting device and a vernier caliper.The experimental material was pear branches where “cuiguan” pear trees were grown, the typical diameter of which is 20 mm.The cutting speed, rotating blade wedge angle and rotating blade rake angle were taken as the influencing factors, and the peak cutting force and power consumption were used as responsive variables in the experimental study.The experiment was designed as a quadratic regression orthogonal of three factors and three levels, and by using the regression analysis method and response surface analysis of the software of Design-Expert 8.0.6, the mathematical model concerning the three factors’ impact on the cutting performance was set up and analyzed, and the experimental verification of the mathematical model was also conducted.The results showed that trial factors had great effects, the peak cutting force and power consumption can be fit with quadratic regression polynomial, and P values of the two equations reached to 0.0001 and 0.0009 respectively , and the values showed that models is much better.The coefficients of determination(R2) were 0.9914 and 0.9812 respectively, and the values showed that 98% of the response values can be explained by models.The significant effects of rotating blade wedge angle, cutting speed and rotating blade rake angle reducing the peak cutting force were in a decreasing order.The significant effects of cutting speed, rotating blade rake angle and rotating blade wedge angle on reducing power consumption were in a decreasing order.The best model of the integrated cutting parameters were as follows: when the cutting speed was 150 mm/min, the rotating blade wedge angle was 30 ° and rotating blade rake angle was 3.5 °, the peak cutting force and power consumption by the models respectively were 2.92 kN and 21.27 J.The model validation tests had been repeated for 3 times on cutting testbed by using the optimization results in the laboratory, the values of max cutting force and power consumption respectively were 2.99 kN and 20.54 J.Both of the relative errors between the experimental and predicted values of max cutting force and power consumption were less than 5%, which indicated a reasonable choice of optimization conditions.These results that the optimization of cutting speed, rotating blade wedge angle, rotating blade rake angle will result in peak cutting force and power consumption saving, and it can provide reference for further study of blade optimization of pear cutting device.