Objective To provide a theoretical basis for designing a device cutting sugarcane tail stalk and establishing a mathematical model for dynamic simulation.Method The precision micro control electronic universal testing machine and static resistance strain gauge were used to perform tensile tests on sugarcane skin, core and joints of the fifth and sixth sections below the growing points of sugarcane tail stalk. The Poisson's ratio parameters of each component were obtained by electrometric method and mechanical analysis.Result The PRXY of sugarcane skin and core of the fifth section below the growing points of sugarcane tail stalk was less than 0.028 and 0.174, and the NUXY was 0.233 and 0.271, respectively. The PRXY of sugarcane skin and core of the sixth section below the growing points was less than 0.001 and 0.223, and the NUXY was 0.238 and 0.289 respectively. The PRXY of sugarcane joint was less than 0.305 and the NUXY was 0.344.Conclusion The PRXY has significant differences among different parts of the sugarcane tail stalk, while the NUXY has little difference. Sugarcane skin and core both have significant differences in PRXY between the fifth and sixth sections below the growing points of sugarcane tail stalk, which has no significant difference in NUXY.