Pneumatic fan

The utility model relates to the technical field of fans. The utility model relates to a fan, in particular to a pneumatic fan. The fan comprises a fan main body, an adjusting seat and a fixed base, ahandle is fixedly mounted at the top of the fan main body; a gear regulator is fixedly mounted at the top of the fan main body; an air pump is fixedly mounted at the top of the fan main body; an airoutlet is fixedly formed in one side of the fan main body; a damping sponge is fixedly mounted at the bottom of the adjusting seat; a prompt lamp is fixedly mounted on one side of the fan main body; apositioning sheet is fixedly mounted in the fan main body; a rectifying plate is fixedly mounted in the fan main body; silencing cotton is fixedly installed in the draught fan body. Through the arrangement of the silencing cotton and the prompt lamp, airflow generated in the air pump can be silenced by installing the silencing cotton, and workers can be prompted under the ground with poor light by installing the prompt lam