Abstract: In view of the characteristics of many parameters, complex interaction and complicated design calculation in the process of transplanter design, this paper develops a man-machine interactive intelligent design platform to shorten the design cycle and optimize the mechanism of rice transplanter. Through the analysis of the movement process of the seed metering device of the rice transplanter, it is identified that the transplanting plant spacing and transplanting depth are the two core target parameters in the process of transplanting, the constraint relationship between the structural parameters and the objective parameters is established, and the optimization design algorithm is determined. Using the optimization design algorithm, a man-machine interactive design system is established, and the structural parameters of the transplanter are obtained by using the design system. Through comparative analysis and experimental verification, the man-machine interactive intelligent design system can quickly and effectively iterate the structural parameters of rice transplanter according to different design requirements, and optimize the parameter combination, effectively shorten the design calculation cycle, and improve the design efficiency and accuracy.