The utility model discloses a blockage cleaning device for a drainage pipe. The device comprises a supporting disc, a fan and a sealing ring, a fan is mounted at the outer end of the supporting disc through bolts; the output end of the fan is connected with a connecting hose; a connecting rope is mounted in the connecting hose; a fixing block is fixedly connected to the tail end of the connectinghose, a bevel gear is installed on the inner surface of the fixing block, the outer surface of the bevel gear is connected with a connecting rope, a first torsion spring is fixedly connected to the inner surface of the fixing block, the inner side of the first torsion spring is connected with the bevel gear, and a first pull rope is installed on the outer surface of the bevel gear. According to the blockage cleaning device for the drainage pipe, a user only needs to place the connecting hose provided with the fixing block into the drainage pipe, and the tail end of the device can extend to blockage positions in the drainage pipes of different types and different depths for cleaning work through the gravity of the fixing block and the flexibility of the connecting hose.