Drainage cleaning device for building underground tunnel

The utility model relates to the technical field of drainage equipment, and discloses a building tunnel drainage cleaning device, which comprises a drainage pipe shell, and is characterized in that a drainage pipe main body is fixedly embedded in the drainage pipe shell, the drainage pipe shell is made of a reinforced concrete shell, the drainage pipe main body is made of a hard ceramic pipe, and the drainage pipe main body is made of a stainless steel pipe. A plurality of high-pressure water spraying pipes are installed at the top end of the water discharging pipe shell in a penetrating mode, the bottom ends of the high-pressure water spraying pipes all extend into the water discharging pipe body, and connecting main pipes are fixedly installed at the top ends of the high-pressure water spraying pipes. In actual use, the problems that a traditional tunnel drainage pipe can discharge a large amount of sewage mixed with mud and sand grains, a sludge layer is gradually formed in the drainage pipe after long-ter