Leakage issues, as a key concern for the quality of underground works, have been influencing construction decisions in engineering practice. Most projects still count leakage on site after a leakage problem has occurred and use this to develop a plugging plan, and as leakage is usually assessed after the overall closure, this leads to insufficient attention being paid to leakage in the preliminary work. In this paper, we take the pursuit of economic benefits as the core and safety and quality as the bottom line for the waterproofing project of the concealed channel of the Ecological Centre project. Before construction, we combine the geological and hydrological situation of the site, conduct statistical analysis of the possible leakage risks and finally focus the waterproofing project on the prevention and treatment of deformation joints, construction joints and concrete cracks. Design from the aspects of waterproof structure design, raw material selection, construction personnel capacity, on-site construction process, etc., to reduce the risk of leakage of underground passages and ensure the normal use of underground passages.