Small-sized dust-removing gun can achieve the purpose of dust-removing and dust-removing by spraying water mist by itself. Because of its small diameter, high density and floating in the air, it can ensure the humidity of the surrounding environment. When evaporating, it will take away a lot of heat and reduce the temperature of the surrounding environment, which is liked and used by all walks of life. The small dust removal gun is easy to operate, which can be operated directly and manually, and can also be remotely controlled. It can also be fully controlled by PLC control to improve the effect of spray dedusting.