This work aims to carry out optimization design of packing box and analyze its compressive performance under different forms of stacking. Specifications of precision armored equipment packing box and optimum proposal of its stacking form were designed. Compressive performance of packing box under different stacking forms was analyzed by finite element method. Either in a separate stacking form or in mixed stacking form, the maximum stress and maximum deformation of all the 5 optimized kinds of packing box were less than the tensile yield stress of linear low density polyethylene material. In conclusion, the compressive performance of all the 5 kinds of packing box under different stacking forms can meet the packaging performance requirements of precision armored equipment.