When installing the air-driven fog gun machine in the construction site, it can be directly installed on the idle cement platform or on the mobile and convenient transport sprinkler. As long as the three-phase electricity or diesel generator set is connected, it can start to work normally, which is very convenient. When the spray gun is used for spraying, it will not only reduce the dust concentration, but also prevent the dust from spreading. When the water mist sprayed by the air-fed fog gun floats in the air, it can keep the humidity of the external environment, prevent dust from drifting with the wind, lower the external temperature, maintain a suitable working temperature and improve the working efficiency.