Underground water level observation device for hydrogeological exploration

The invention relates to a hydrogeological exploration underground water level observation device, and relates to the field of geological exploration, the hydrogeological exploration underground water level observation device comprises a support frame and a take-up roller arranged on the support frame, and further comprises a protection air bag, a buoyancy observation assembly and a control assembly, the protection air bag is used for stretching into an observation well, and the buoyancy observation assembly is protected; the buoyancy observation assembly comprises an observation rope and a floating part arranged at one end of the observation rope, the observation rope is wound on the take-up roller, the control assembly comprises a stabilizing part and a locking part, the stabilizing part is used for reducing the shaking amplitude of the observation rope after the floating part abuts against the water surface, and the locking part is used for fixing the observation rope when the floating part abuts against t