Abstract: Water leakage of tunnel lining is a common disease which endangers the safety of tunnel structure and operation. In light of the shortcomings of current treatment methods, a new treatment technology was proposed,namely grooves are made at three sides or around the place of leakage and multi-function drainage channels are installed, adjustable bolts and steel strips are arranged at the two side grooves to apply pressure at the connection when it′ s necessary, several multi-function drainage channels are connected by thin drain pipes to drain the water to the nearest drain pipes. The main advantages are that water can be collected and drained and it turns the passive drainage into active drainage, it also has the functions of maintenance, replacement, cleaning and dredging. The engineering practice shows good effect is achieved by this new treatment technology