Abstract: In order to predict and reduce the microstructure and performance defects produced during carburizing quenching of 33MnCrB5 steel, DEFORM software was used to simulate the carburizing and quenching process of 33MnCrB5 steel.The effects of quenching temperature field, quenching stress field and quenching phase transformation process on the deformation of plow tip were studied.The simulation results show that the carburized 33MnCrB5 steel after carburizing-quenching-tempering treatment has a maximum carbon content of about 0.97wt% in the carburized layer and shows a maximum hardness value of 60 HRC with a carburized layer depth of about 2.3 mm.Compared to the core base material, the cooling rate near the plow tip edge and threaded hole increases significantly during quenching and cooling, resulting in a preferential martensitic phase transformation and volume abruptness in this area, and a maximum deformation of about 0.3 mm at these two locations is formed.In addition, the surface layer of the plow tip eventually shows a state of tensile stress and the core shows a state of compressive stress, which is mainly attributed to the combined effects of thermal stress generated by temperature changes and microstructure stress generated by martensitic phase transformation.This study is expected to provide a reference for solving the problems of microstructure defects and deformation cracking in the carburizing and quenching process of wear-resistant boron steel for agricultural machinery.