Abstract: Tunnel waterproof and drainage system is a key guarantee for safe operation, especially in severe cold areas aff ected by freezing and thawing. Once there is water leakage, it will greatly aff ect the quality of tunnel operation and service life. Therefore,careful planning must be carried out before construction, combined with common quality problems. The prevention and control measures to ensure the meticulous construction of each link, the construction process must be strictly controlled to ensure the quality of the entire tunnel's waterproof and drainage system.