Abstract: Aimed at the lack of perfect seepage-stress-cracking coupling analysis model in simulating inner water exosmosis of pressure tunnel,a cohesive crack element model coupled with seepage analysis is introduced based on the traditional cohesive crack model.A seepage-stress-cracking coupling analysis model for inner water exosmosis of pressure tunnel is established based on the Biot's consolidation theory and the body force theory of applying the inner hydraulic pressure.A typical pressure tunnel with circular section is chosen as an numerical example to verify the coupling analysis model.The simulation results qualitatively agree well with the test results.Therefore,this coupling model is reasonable and feasible,and the model can be used to conduct coupling analysis of seepage-stress-cracking for the inner water exosmosis of pressure tunnel.