Abstract: In the process of tunneling along the slope of a large slope than TBM, the impact of tunnel gushing and TBM construction waste water on the construction is more significant than the harm caused by flat tunnel TBM tunnel excavation. This paper analyzes the hydrogeological data of a project in Xinjiang, and analyzes the characteristics and hazards of the tunnel water flow during the TBM excavation process. According to the characteristics and hazards, combined with the actual construction practice, a set of A comprehensive drainage system with auxiliary drainage has been set up to effectively solve the drainage problem in similar projects.