The article discusses the method of drainage device. The proposed method relates to the field of construction, namely to the device of drainage systems for the protection of buried parts of buildings and structures subject to constant or periodic flooding of natural and man-made nature in conditions of poorly permeable weak soils of the base and shallow occurrence of water-resistant layers. Proper drainage of the territory of a potentially flooded underground structure during operation is achieved by ensuring the trouble-free functioning of its drainage system by harmonizing the functions of all its elements.