The dynamic evolution process of frozen wall temperature in Tunnel Construction of Shanghai Yangtze is studied by finite element method. Considering the effect of heat radiation of tunnel lining and refrigerate battery, a three- dimensional solid element modal is built to simulate the construction process, in which latent heat of phase change is indicated by way of Enthalpy application. The law of frozen wall development, frozen wall closure, average temperature and effective thickness is summarized in this paper. Research demonstrates that the process of froze wall forming is successive and has some rules to follow. The time of frozen wall closure, average temperature and thickness agrees well with the on-site test data, which validates the numerical results. The result is of value to similar projects.