Water conservancy river channel trash holding device

The utility model relates to the technical field of water conservancy equipment, and discloses a water conservancy riverway trash holding device which comprises a holding dam, a holding plate arranged on the holding dam and a trash salvaging and conveying assembly arranged on one side of the holding plate, and the trash salvaging and conveying assembly comprises a salvaging groove and two sets of screws fixedly connected with the salvaging groove through a support. The groove is formed in the intercepting dam on one side; the transmission shaft is rotationally connected between the inner wall of the groove and the top plate; the rotating shaft is rotationally connected into the fishing groove; the auger blade is fixedly arranged outside the rotating shaft in a sleeving manner; the installation plate is fixedly connected with the salvage groove, the hollow shaft sleeve is rotationally connected with the installation plate and movably connected with the transmission shaft, and the bevel gear ring is fixedly arr