The invention relates to a rainproof film covering method for solid waste landfill area. The rainproof film covering method adopts multi-layer film composite covering, the fixation effect is good, therainproof effect is good, and the rainproof film is not prone to being damaged. The rainproof film with suitable size and composition is replaced in time according to season and month so as to ensurethat the leachate content does not exceed the standard.