In order tosolve the problem that the operation process of the membrane hybrid winnowing machine is unstable and the numerical simulation lacks parameters which is difficult to simulate, the collision model between the rhizome of peanut seedling and the mechanical working parts was constructed through single factor and multi-factor experimental research, and the accurate determination of the recovery coefficient was realized. Based on the differences in mechanical properties of peanut seedling rhizomes, the collision material, collision angle, falling height and moisture content were selected as the test factors, the influence of the test factors on the recovery coefficient of peanut seedling roots and stems was studied, the regression model between the test factors and the recovery coefficient was established, and the regression analysis of the test factors was carried out. The results of single factor test showed that the recovery coefficient of peanut seedling roots was greater than that of peanut seedling stems, and the recovery coefficients between peanut seedling roots and stems and No.45 steel, acrylic plate, peanut seedlings, rubber sheet and plastic film decreased in turn, and the deviation of the recovery coefficient was decreased with an average deviation of 0.068 4. The average deviation was 0.092 6, the average deviation of the recovery coefficient fluctuated up and down with the increase of falling height, and the average deviation was 0.087 8, and the average deviation of the recovery coefficient was decreased sharply with the increase of the moisture content, the moisture content reached 40%, and the deviation of the recovery coefficient was decreased sharply, with an average deviation of 0.082 7, and the determination coefficient of the regression equation was greater than 0.97. The orthogonal test results showed that the order of the factors affecting the recovery coefficient was as follows：collision material, collision angle, falling height and moisture content. The results of the verification test showed that the average relative errors of peanut seedling roots and stems were 3.928% and 4.146%, respectively. The rsearch result can provide a reference for the setting of numerical simulation parameters of seedling film separation, membrane miscellaneous winnowing machine and other equipment.