Water depth measurer

The utility model discloses a water depth measurer, and relates to the field of water depth measurement. The water depth measurer comprises a shell, a supporting frame, a rope winding device, a water depth measuring device and a water depth measuring device, the water depth measurement traction rope is connected to the rope winding device, the end, away from the rope winding device, of the water depth measurement traction rope is fixedly connected with a balance weight thousand block, and the water depth measurement traction rope is painted with scale marks; the first groove is formed in the bottom of the balance weight thousand block in an embedded mode; the pressing block is connected into the first groove in a sliding mode, and a first spring is arranged between the pressing block and the first groove; according to the utility model, before an underwater ground wire is installed, the water depth of a water area needs to be measured, and then the insertion rod is inserted into sludge at the water bottom, so