Water level measuring device

The utility model discloses a water level measuring device which comprises an installation frame and a vertical rod, a second threaded rod is rotatably connected in the installation frame, a sliding plate is sleeved on the second threaded rod, an extension frame is fixedly installed at the bottom end of the sliding plate, the left side of the extension frame extends out of the installation frame, and a connecting frame is fixedly installed on the left side of the extension frame. A first measuring rod is fixedly installed in the connecting frame, and a first threaded rod is rotationally connected into the first measuring rod. When the water level measuring device is used at a slope bank, the distance between the first measuring rod and the slope bank can be prolonged, the problem that in the water level measuring process, the first measuring rod makes mistaken contact with a slope, and consequently the measuring result is wrong is solved, meanwhile, the underwater camera is arranged to check whether the base