Automatic dust falling system of excavator and control method

The invention relates to an automatic dust falling system of an excavator and a control method. A nozzle atomization device is connected with a booster water pump and a booster air pump through a booster water pipe and a booster air pipe respectively, the booster water pipe and the booster air pipe are provided with a booster water pipe pressure sensor and a booster air pressure sensor respectively, and the booster water pump is connected with a water storage tank through a normal-pressure water pipe; and a water level sensor, a heating device and a temperature sensor are arranged in the water storage tank, a main controller is also included, the main controller is connected with a bucket outward swinging hydraulic oil pipe pressure switch, a bucket inward retracting hydraulic oil pipe pressure switch and a display instrument. The excavator is provided with the water storage tank, a spraying device and a related pipeline system, and one booster air pump and one booster water pump are used for working at the s