Automatic spraying device of jet mill

The utility model relates to an airflow mill automatic spraying device which comprises a box body assembly, a spraying assembly, a spraying assembly and a control assembly. The box body assembly comprises a box body, and the box body is provided with an inner cavity which can be closed; the spraying assembly comprises a nozzle, a hose, an additive container and a control pump, the nozzle is arranged outside the box body, one end of the hose is connected with the nozzle, and the other end of the hose is connected with the additive container; the additive container is arranged in an inner cavity of the box body and is configured to contain an antioxidant; the control pump is connected with the hose in a matched mode and is configured to control the flow of fluid in the hose. And the nozzle accommodating container is configured to accommodate anti-oxidation liquid, is arranged outside the box body, and is configured to accommodate the nozzle when the nozzle does not work. According to the scheme, the powder can