Drainage structure of environment-friendly building wall

The utility model belongs to the field of building drainage equipment, particularly relates to a drainage structure of an environment-friendly building wall, and aims to solve the problems that an existing drainage pipe for an environment-friendly building is complex to detach from a wall and poor in convenience. According to the technical scheme, the domestic wastewater treatment device comprisesa mounting plate, a rectangular lifting hole is formed in the mounting plate, the interior of the lifting hole is movably sleeved with a horizontal rectangular lifting plate, a second clamping blockis fixed to the bottom wall, located outside the lifting hole, of the lifting plate, and a second clamping block is fixed to the bottom wall, located outside the lifting hole, of the lifting plate. Ahorizontal supporting plate is fixedly connected to the side wall of the portion, located under the lifting plate, of the mounting plate, a first clamping block is fixed to the top wall of the supporting plate, and a round drai