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In order to study the discrete element simulation physical parameters of potato minituber, the combination methods of experiment and simulation were used to calibrate contacting parameters of particle discrete simulation. The simulation experimental model was built in EDEM by using coefficient measurement model of restitution, particle-steel friction coefficient measurement model and particle-particle coefficient friction measurement model. The corresponding contacting parameters of particle discrete element was used as independent variable, the data which was measured by simulation model was used as evaluation index, and then curve fitting equation was built by changing the independent variables to obtain the corresponding evaluation index value in the simulation model. Finally, the factors measured in the real test model were substituted into curve fitting equation as the simulation target values to obtain the discrete element simulation contact parameters of potato minituber. The simulation experiment was verified through repeated simulation experiments. The particle discrete element simulation target parameters were obtained as the particle-steel coefficient of restitution was 0.523, the particle-particle coefficient of restitution was 0.478, the particle-steel coefficient of static friction was 0.644, the particle-steel coefficient of rolling friction was 0.0221, the particle-particle coefficient of static friction was 0.325 and the particle-particle coefficient of rolling friction was 0.0300. The calibrated physical parameters of the potato minituber were simulated by EDEM. The result showed that the calibrated particle stacking angles and seed distribution were consistent with the real experimental conditions. Simultaneously, the result can provide theoretical basis for the design and optimization of potato minituber related sowing equipment.