The ground surface settlement, convergence and crown settlement of Xiaoxun tunnel Guzhu expressway is monitored and analyzed in accordance with the characteristics of the surrounding rocks of different grades. The basic law of the timedependent curves and longitudinal distribution curves of the deformation of surrounding rocks of different grades are discussed. The excavation process of the tunnel in surrounding rocks of different grades is simulated by means of finite element software ABAQUS, and the influence of the surrounding rock grades on the stability of the surrounding rocks of the tunnel is analyzed by considering the numerical simulation results and the field monitoring data. The study results show that the higher the grade of the surrounding rocks is, the larger the ground surface settlement and the tunnel deformation during tunnel excavation will be, and the longer time it will take for the deformation to become stable.