Anti-blocking drainage pipeline for building

An anti-blocking drainage pipeline for a building is integrally in a Z shape and comprises an inlet section, a vertical section and an outlet section which are sequentially connected in series and fixed. A valve is arranged in the inlet section, a fixing block is fixed to the pipe wall, above the valve, of the inlet section, a selectable vertical shaft is arranged in the fixing block, the lower end of the vertical shaft is fixedly connected with the valve, and the upper end of the vertical shaft is fixedly connected with a handle. The opening degree of the valve can be controlled through the handle; the vertical section comprises a cutting cavity, and the pipe diameter of the cutting cavity is larger than that of the vertical section; a sealing box is fixed above the vertical section, a motor is fixed in the sealing box, an output shaft of the motor extends into the cutting cavity to form a rotating shaft, and a sealing piece is arranged between the output shaft and the pipe wall of the vertical section. Comp