Forestry insect prevention pesticide spraying quantifying device and using method thereof

The invention discloses a forestry insect prevention pesticide spraying quantifying device and a using method thereof, and belongs to the field of forestry insect prevention equipment. A forestry insect prevention pesticide spraying quantitative device comprises a storage box, a stirring barrel is installed in the storage box, a turning cover is rotationally arranged at the top of the storage box through a hinge, and a power assembly used for providing power is arranged on the turning cover; the turnover cover is arranged at the top of the storage box, so that the interior of the storage box is convenient to open, the interior of the stirring barrel is convenient to clean, maintain and install, labor intensity is reduced, working efficiency is improved, poured liquid medicine is fully mixed through cooperation of the power assembly, the stirring assembly and the reciprocating assembly, medicine precipitation is prevented, and the medicine effect is improved; meanwhile, a spraying nozzle swings left and right,