Abstract: This paper introduces the application and analysis method of ANSYS, uses SolidWorks software to model the cutting mechanism design of the rootstock of the Youcha seedling grafting machine, uses ANSYS program to simulate the stress state and service life of the cutting cutter, and obtains the stress state of the cutting cutter in the cutting process of the rootstock of the Youcha grafting machine, which provides a reference for the selection of the cutting material and the optimization design of the cutting structure The theoretical basis is provided.