Target-oriented precise pesticide application system of unmanned aerial vehicle

An unmanned aerial vehicle targeted precise pesticide application system comprises a rotor wing unmanned aerial vehicle and a fixed rack. The rack is provided with a power supply module, a gas-liquid control module and a liquid supply module; an ultrasonic pneumatic spray head pose adjusting module is arranged at the end part of a rotor wing rod piece of the rotor wing unmanned aerial vehicle and is used for adjusting the circumferential rotation and up-and-down pitching poses of an ultrasonic pneumatic spray head; the liquid supply module is used for supplying liquid medicine to the ultrasonic pneumatic spray head arranged on the position and posture adjusting module; the gas-liquid control module is used for supplying air pressure to the ultrasonic pneumatic nozzle and controlling the liquid amount and the spraying speed; a crop information acquisition module is arranged on a rotor wing rod piece of the rotor wing unmanned aerial vehicle and is used for acquiring crop information; and the power supply modul