In order to further improve the working quality of the seed picking device of the sprocket moving knife type automatic potato slicing machine, the working process of the seed picking device of the slicing machine was simulated and analyzed based on the EDEM-RecurDyn coupling method, and a quadratic rotation orthogonal combination experiment was designed. Taking seed filling inclination angle, sprocket speed and species height as influencing factors, seed qualification index and seed loss index as response values, the influence law of each factor on response value was determined by pre-test and single-factor test. Based on the previous simulation test results, the optimal working parameter combination of the seed selection device was obtained, and the reliability of the optimal parameters was verified by bench test. The results showed that: when When the mass of seed potato was within140 to 210 g, the primary and secondary factors affecting the qualified index of seed selection were sprocket speed, species height and seed filling inclination angle, and the primary and secondary factors affecting seed loss index were species height, seed filling inclination angle and sprocket speed. Based on the regression model, the optimal working parameters of the seed collecting device were obtained as follows: Seed filling angle 29.59°, species height 352.77 mm, sprocket speed 44.25 r/min. The bench test with the optimal parameters showed that the qualified index of seed selection was 94.31%, and the loss index of seed selection was 4.85%, which is close to the prediction result of simulation test.
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