Abstract: Based on the viscoelastic theory, the FLAC software was adopted to simulate the creep effect of Hanjialing large-span road tunnel to access the long-term stability. The results show that the creep process of the excavated rock mass will maintain a quite long period and then tend to steady. The creep effect at the crown is significant, and then in turn are the arc feet, bottom and sidewall. The simulation results are consistent with the field measurements well. The creep effect at the crown should be considered seriously not only in the excavation analysis, but also during the long-term creep. The numerical results and relevant conclusion may be helpful for the numerical analysis on large-span tunnel, which may also offer the important references for design and construction of tunnels.