Abstract: Taking the deep buried free-flow large-diameter tunnel of the West Route Project of the South-North Water Transfer Project as an example, the expressions of stresses and displacement of the surrounding rock and liner are deduced considering the high-geostresses and the dynamic actions of the anchor rod and liner. Calculation results show that the stability failure risk based on the rheologic values of the tunnel liner and surrounding rock reaches the maximum after five years, and becomes more stable with the rehologic stability of the surrounding rock. The risk of a tunnel without liner in time is much higher than that with liner.