The utility model discloses an agricultural plant protection UAV sprinkler systems, mainly to solve the poor spraying effect UAV sprinkler system in the prior art, and low utilization of pesticides. The UAV agricultural plant protection sprinkler system, characterized by comprising: a medicine chest, boom, nozzles, tubes, pumps; the upper end is provided with a liquid inlet kits, the lower end is provided with a liquid outlet; the end of the boom mounted on the frame, the other end extended outward, the spray nozzle mounted on the rod, one end of the catheter through the pump and the nozzle connected to the liquid outlet and the other end on the medicine chest connection. The utility model and uniform spray atomization effect enhance the effectiveness of the pesticide control effect optimal.