Effects of EPC pressure field on the mechanical properties of ZL101 aluminum alloy components were investigated.The MGM（1

N）model of pressure and density

tensile strength as well as hardness of the parts was established

and background value of the model was optimized.MGM（1

N）model can be used not only for fitting complex relationship between pressure and mechanical properties of the parts

but also for predicting density

tensile strength and hardness of the castings under different pressure.The results show that the model has a high prediction accuracy

exhibiting apositive role in lost foam process optimization of ZL101 aluminum alloy.