Improving the hot working performance of powder metallurgy superalloys and other difficult to deform alloys is an important way to improve the alloy formability, the rate of material and the development of high performance alloys. Hot extrusion in the alloy preparation process can effectively improve the microstructure and enhance the hot working properties of the alloy. This paper reviews the research progress of hot extrusion process parameters of powder metallurgy superalloys in recent years, systematically discusses the influence of hot extrusion parameters on the extrusion process and microstructure, and summarizes the research work on the selection and optimization of hot extrusion parameters. At present, the influence of extrusion speed and extrusion ratio on alloy microstructure, numerical simulation of hot extrusion process and optimization of extrusion device need to be further studied. This is used to provide reference for understanding the hot extrusion process and subsequent engineering practice, and to provide certain theoretical guidance and technical support for regulating the alloy microstructure, optimizing the hot working process and improving the hot working performance.