The research results of the influences of extrusion cone angle,extrusion speed and friction coefficient on temperature rise can be used to guide mold design and lay the foundation for the establishment of temperature rise model.During the extrusion process,the heat generated by severe friction between billet and die and the plastic deformation of billet effects the temperature rise of die cavity.Elastic-plastic finite element analysis model was established based on elastic-plastic mechanics,heat transfer and finite deformation theory.The model was analyzed by MARC software,and the relationship between the coefficient of friction,extrusion speed,extrusion cone angle and temperature rise of die cavity was investigated.The analysis results shows that with the rise of extrusion speed,the three stages of the temperature rise change of die cavity are decrease,steady and increase,when a cone angle is constant and the friction coefficient is gradually increased from 0 to 0.1.When the extrusion speed is constant,the temperature rise is increased with the increasing of friction coefficient and extrusion cone angle.When the friction coefficient is fixed,the temperature rise is increased with the rise of extrusion speed and cone angle.