Abstract: Molecular dynamics is of great significance for the study of multi -phase evolution. The metalproperties and kinetic characteristics of Mg-Zn alloy under different cooling rates have been studied from theperspective of molecular dynamics in this thesis. The simulation shows that the cooling rates of 160 K/ps and150 K/ps are the critical points of Mg -Zn alloy solidifies into amorphous and crystalline. 725 K is thecompetitive temperature zone of short range ordered structure and long-range ordered structure interaction.