Pesticide application device for forestry pest control

The utility model relates to the technical field of forestry, and discloses a pesticide applying device for preventing and controlling forestry diseases and insect pests, which comprises a moving mechanism, a pesticide liquid tank arranged at the top of the moving mechanism, and a spraying mechanism arranged on one side of the pesticide liquid tank, an infusion pump is arranged between the liquid medicine tank and the spraying mechanism, the spraying mechanism comprises a hydraulic supporting frame, semicircular limiting plates arranged on the two sides of the top of the hydraulic supporting frame and a spraying head arranged between the semicircular limiting plates, and any semicircular limiting plate is rotationally connected with the top of the hydraulic supporting frame; the tops of the two semicircular limiting plates are fixed through bolts, one end of the spray head is connected to the infusion pump through a liquid guide pipe, a plurality of nozzles are arranged at the other end of the spray head, and