Dust fall device for open-cast mining

The utility model relates to a dust falling device for open-cast mining, which comprises a movable base, a motor is fixedly mounted at the bottom of the movable base, a water storage tank connected with an output shaft of the motor is movably mounted at the top of the movable base, and a water level reminding mechanism is arranged in the water storage tank. According to the dust falling device for open-cast mining, by arranging the inductor, when water needs to be injected into the water storage tank, a buoy can rise along with the water level of the injected water, after the buoy rises and touches the inductor on the top, the inductor can transmit water fullness information to the controller, and the controller controls a prompt lamp to turn on a green light to remind a user; when water is used in the water storage tank, the buoy can descend along with the water level of the used water, after the buoy descends and touches the sensor at the bottom, the sensor can transmit water shortage information to the con