A large number of magnesium alloy strips have been applied in 3C industries, especially used in notebooks and flash drives. This study involves analyses and experiments of magnesium's hot extrusion of 1mm strips. At first, hot compression tests are conducted to obtain the magnesium's plastic flow stresses in high tempearatures, which are used in the finite element analysis. In the FE simulations of hot strip extrusion, the flow pattern of the magnesium billet within the die, the temperature history at the die exit and the elastic deformation of the die are analyzed. Sound products are achieved by appropriate extrusion conditions. Finally, hot extrusion experiments are conducted and the experimental values of the extrusion load and dimensions of the products are compared with the analytical values to verify the validity of the analytical models. The extrusion process technology for Magnesium strips is successfully developed.