The invention relates to a process for processing a magnesium alloy shell. The process is characterized in that the process comprises a metal hot die punch forming process which comprises the following steps: 1. a special forming die is placed on an oil pressure type punching machine, and the die is heated up to a temperature of between 150 and 280 DEG C; 2. the magnesium alloy material is directly placed on the heated forming die; and 3. the punch forming is performed. The process facilitates realization of punch processing production of the magnesium alloy shell so as to improve product quality and production efficiency; moreover, the process also has the advantages of original conception, reasonable design, and big popularization value.