Drainage pipe reinforcing tool

The utility model relates to the technical field of drainage pipe reinforcing tools, in particular to a drainage pipe reinforcing tool which comprises a base, positioning clamping pins are inserted in the left side and the right side of the base through threaded holes, a frame is arranged in the center of the top end of the base, and the inner side of the frame comprises a plurality of clamping pieces which are oppositely arranged in two sets. The clamping piece comprises a lower supporting plate, lower pressing plates are symmetrically arranged at the top end of the lower supporting plate, the side of the lower pressing plate on the right side is connected with a limiting block, and the limiting block is embedded in the inner wall of the frame through a groove. The drainage pipe can be clamped and fixed through mutual cooperation of the lower supporting plate and the lower pressing plate, the lower pressing plate moves downwards in the upper frame plate through rotation of the threaded rod, the lower support