AZ31 magnesium alloy is used as a research object to explore whether the solid-solution, large strain deformation and post heat treatment can be used to prepare a high strength magnesium alloy. It is found that a yield strength of about 330 MPa can be got by the solid-solution and large strain deformation, and a yield strength of about 370 MPa can be got by the post appropriate aging due to aging strengthening. The plasticity can be enhanced by post recrystallization, keeping the strength of solid-solution state at the same time. Many twins and dislocations are found in the large strain deformation sample with a mean grain size of 1~3 μm. It can be concluded that the solid-solution, large strain deformation and post heat treatment technology is an a effective method to enhance the strength and ductility for aluminum alloys and magnesium alloys