By analyzing the true stress–strain curves of pure copper under various deformation conditions during the hot deformation process, the constitutive equation was established based on the strain-compensated Arrhenius model. Metallographic observation and microhardness measurement were carried out of the hot compressed specimens. In this study, pure copper’s hot deformation behavior was studied through isothermal compression tests at deformation temperatures of 350~750 ☌ with strain rates of 0.01~5 s −1 on a Gleeble-3500 isothermal simulator.