Abstract: In order to ensure the safety and stability of the frame in the working process of the planter, stainless steel and Q235A 2 materials are selected respectively, and the static analysis of the frame is carried out by ANSYS Workbench. It is concluded that the performance of the frame made of Q235A is better. It is found that the structural strength is redundant, and the structure is optimized.After optimization, the strength can still meet the requirements, and the mass is reduced by 10.6%. At the same time, in order to avoid resonance, the modal analysis of the frame is carried out, and the first ten natural frequencies are compared with the excitation frequency of seeder chassis engine, and the result is that the frame will not resonate with the engine.