Abstract: The effects of deformation temperature on the structure and mechanical properties of ZK60 magnesium alloy by compound extrusion were studied by means of optical microscope, scanning electron microscope and universal testing machine.The results show that the grain size of ZK60 magnesium alloy extruded at different temperatures is refined, the microhardness, strength and plasticity are increased, and the tension-compression asymmetry is improved.As the deformation temperature decreases, the more obvious the grain refinement is, the higher the hardness value is.The dynamic recrystallization of the extruded sample at 200℃ is sufficient, the grain is fine, the average microhardness reaches 77.8 HV, and the compression yield strength reaches 250 MPa, which is 20.6% and 82.5% higher than that of the sample before extrusion.The tensile yield strength of the sample extruded at 250℃ is 230 MPa and the elongation after breaking is 21.8%, which is 21.1% and 24.6% higher than that before extrusion respectively.The above research shows that compound extrusion technology is an effective method to improve the properties of magnesium alloy.