The invention relates to the technical field of pipeline detection, in particular to a drainage pipeline detection equipment, including a detection water tank, a lifting frame, a detection frame, a first hydraulic push rod, a manipulator, a conveying frame, a placement frame, a defective product box, a water removal component, The first sealing assembly, the second sealing assembly, two guide rails, two fixing frames and two second hydraulic push rods, a transparent glass plate is arranged on the front outer wall of the detection water tank, and a mounting plate is installed on the left outer wall of the detection water tank. The lifting frame is slidably installed on the two guide rails, the detection frame is installed on the top of the lifting frame, the first hydraulic push rod is vertically arranged on the top of the detection frame, and the first sealing assembly and the second sealing assembly are respectively arranged on the top of the detection frame. On the top and the output end of the first hydraulic push rod, the dewatering assembly is installed on the top of the conveying frame. The invention realizes sealing detection for drainage pipes with different diameters, a large number of air bubbles are generated at the leakage points of the drainage pipes, which is convenient for manually visually finding the positions of the leakage points of the pipelines, and reduces the detection time.