The DB/TJ 08-204-1996 standard is a technical specification for waterproof film engineering in underground buildings, which mainly specifies the waterproof film construction technology of underground projects. The standard specifies in detail the requirements for the selection of waterproof film materials for underground buildings, construction technology, quality control, acceptance standards, etc., aiming to ensure that underground buildings have effective waterproof performance during use. Through strict requirements for waterproof layer thickness, construction environment, film adhesion, impermeability and other technical indicators, the standard provides scientific technical guidance for waterproof treatment of underground projects, and promotes the improvement of waterproof construction mass and the standardization of industry technology.