The invention relates to a spraying device, in particular to a pesticide spraying device for agriculture and forestry protection. The pesticide spraying device for agriculture and forestry protection is full in pesticide mixing and wide in spraying range. For solving the technical problem, the pesticide spraying device for agriculture and forestry protection comprises a base plate, wheels, a push handle, a sunshade plate, a first motor, a second bearing seat, a large belt wheel, a small belt wheel, a flat belt, a stirring rod, a rotation rod, a first bearing seat and the like. The wheels are installed at the bottom of the base plate, the push handle is connected to the left end of the top of the base plate in a welded mode, and the sunshade plate is connected to the upper portion of the left side of the push handle in a welded mode. The pesticide spraying device achieves the effects of full pesticide mixing and wide spraying range, stirring blades stir a pesticide to make the pesticide mixed fully, and a cylinder body rotates back and forth to drive a spray head to rotates back and forth, so that a spraying range is wider, and the efficiency is higher.