Abstract. In this paper, a two-dimensional ablation heat transfer model with moving boundary is established for the ablation heat transfer process. The transient temperature field and surface ablation rate of the model were numerically calculated by finite element method and moving mesh technology. The relationship between the ablation rate of the node on the ablation moving boundary and the external heat flux of the boundary was qualitatively analyzed. The calculation results show that the calculation of two-dimensional ablation heat transfer model with finite element and moving mesh technology has good stability and convergence.