Negative-pressure suction type pesticide mixing drum for spraying pesticide to horn-shaped crisps

The utility model discloses a negative pressure suction type pesticide mixing drum for spraying pesticide on horn crisp, which comprises a mixing drum, the top of the mixing drum is provided with a negative pressure through hole, the inner wall of the mixing drum is fixedly connected with an air exhauster through the negative pressure through hole, and the two sides of the mixing drum are providedwith feeding through holes. According to the utility model, the funnel is arranged; pesticide is firstly placed in funnel, opening a second sealing valve, opening the first sealing valve, the mixingcylinder passes through a first connecting pipe and a second connecting pipe; the pesticide in the funnel is sucked into the mixing cylinder; starting motor, motor-driven rotating rod, the rotating rod drives the stirring blades to rotate to stir pesticide, the rotating rod drives the rotating cylinder and the limiting circle to rotate around the annular groove through meshing of the conical gearand the conical teeth, and