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Abstract. In recent years, with the progress of technology, the power and maximum driving speed, and the working pressure of hydraulic system of tractors have been improved greatly. These changes make the research demand of large horsepower tractors increase. In order to meet the needs of compound operation, large horsepower tractors have higher requirements for the strength of hitch links, so it is necessary to measure the stress and strain of them. In the operating load, the stress and deformation of hitch links are large, measured by the sensor results often have large errors, which directly affects the rationality of the size and structure design of the hitch links. In order to obtain more accurate results, to better meet the operating requirement, design of hitch links through the finite element analysis is necessary.

In this paper, through a combination of 3D modeling software Creo and finite element analysis software ANSYS, a 3D modeling and assembly of hitch links is carried out, then with the analysis function of ANSYS workbench, the stress and strain distribution of hitch links under operating load are simulated and analyzed. According to the result of the simulation, some suggestions for improvement are put forward to improve the quality and efficiency of tractor operation and improve the safety of hitch links in engineering application.