Taking LuntouDaxuecheng section of line 4 of Guangzhou Metro as example, the author predicts the value of the surface deformation caused by the soil pressure in the excavation chamber shield tunneling by means of 3dimension finite element models. The author makes a profound study on the deformation problems in shieldtunneling. On basis of analysis and comparison of the site measurement results，the author summarizes the surface subsidence patterns. The paper can provide guiding significance for the construction in the future.