Hydraulic engineering blind ditch smoothness detection device

The invention relates to the technical field of hydraulic engineering, in particular to a hydraulic engineering blind ditch smoothness detection device. The hydraulic engineering blind channel smoothness detection device comprises a detection unit and an adjusting unit, the detection unit comprises a detector, a detection assembly arranged in front of the detector, a movable assembly, a guide wheel, a base plate, a sliding sleeve, a steering assembly and a sliding rod located in the sliding sleeve, the steering assembly is connected with the sliding rod, the movable assembly is located in front of the detector, and the guide wheel is located on the base plate. The movable assembly is connected with the guide wheel through the steering assembly, the guide wheel is arranged on the base plate, the adjusting unit comprises a sealing cover, a pin shaft arranged below the sealing cover, a limiting assembly located above the sealing cover, a pressure relief assembly and a plurality of pressure relief holes, and the