Spraying device for forestry pest control

The utility model discloses a spraying device for preventing and controlling forestry pests, which structurally comprises a liquid conveying rotating block, a spraying block, a rotating shaft block, a flow inlet pipe, a sealing ring, a rotating bottom plate and a spraying rod, and is characterized in that when pesticide liquid flows into a liquid passing groove, a liquid spraying mechanism on a shell is impacted; according to the pesticide spraying device, the sliding block is driven to slide, so that the sliding block is impacted, the sliding groove in the sliding block vertically slides upwards along the rail of the sliding rod, meanwhile, the sliding block is limited and clamped by the clamping block, the spraying opening in the sliding block can leak out and spray pesticide, and after pesticide conveying is stopped, the sliding block slides downwards to reset under the action of gravity to seal the spraying opening; by improving the structure of the equipment, when the equipment is not used, the open nozz