Atomizer capable of preventing liquid medicine from flowing back

The utility model discloses an atomizer capable of preventing liquid medicine from flowing back, which belongs to the technical field of atomizers and comprises a base, two vertical frames arranged at intervals are fixedly mounted on the base, a medicine barrel is arranged at the upper end of the base, a liquid injection pipe is communicated and fixedly mounted on the medicine barrel, a valve is mounted on the liquid injection pipe, and symmetrically distributed support frames are arranged on two sides of the medicine barrel. And the movable mechanism is arranged on the pesticide barrel and is connected with the support frames on the two sides. Supporting rods are fixedly installed on the two vertical frames, an atomizer is arranged between the two supporting rods, the pesticide barrel is located at the lower end of the atomizer, pesticide liquid is pumped out through a pump body on the pesticide barrel and enters the flow guide pipe, the pesticide liquid flows into the atomizer from bottom to top and is atom