Boiler water level measuring instrument

The utility model discloses a boiler water level measuring instrument, which belongs to the technical field of boiler water level measuring instruments and comprises a water level gauge main body and a liquid level pipe, a floating block is mounted at the bottom end of an inner cavity of the liquid level pipe, a magnetic sheet is compounded and adhered to the upper surface of the floating block, and a mounting table is fixedly connected to the top end of the water level gauge main body. A top plate is arranged at the top of an inner cavity of the liquid level pipe and is of an annular structure, and when the floating block is close to the top plate, it is indicated that water in the boiler reaches the highest liquid level, so that an elastic piece in the reed pipe is closed through a magnetic sheet arranged on the floating block by means of magnetic force, and the water in the boiler reaches the highest liquid level. The sound-light alarm lamp is used for warning, so that an operator stops water injection of