Stable floating type underground water well water level monitor

The utility model relates to the technical field of water level monitors, in particular to a stable floating type underground water well water level monitor which comprises a limiting assembly, a sliding assembly is installed in the limiting assembly in a sliding mode, and a buoy assembly is detachably installed on the sliding assembly. According to the stable floating type underground water well water level monitor, the buoy assembly is detachably installed through the symmetrically-arranged sliding assemblies, so that the buoy assembly can stably bear buoyancy from the liquid level, the floating force can be further increased through the air bag, and the gravity center cone can apply gravity so that the floating plate can stably descend in time when the liquid level descends; the stability of the floating plate is improved; in addition, the sliding assemblies installed in the limiting side plates on the two sides in a sliding mode can reduce friction force through bearings, the overall symmetrical structure