Unmanned aerial vehicle

The unmanned aerial vehicle comprises an upper shell body and a lower shell body, a power switch is installed on the upper portion of the upper shell body, transmitters are installed on the upper portion of the upper shell body and the two sides and the rear end face of the lower shell body, a camera and a receiver are installed on the end face of the lower shell body, and collecting boxes penetrate through the two sides of the lower shell body in a sliding mode. Four sets of supporting arms are welded to the two sides of the lower shell correspondingly, motors are installed on the lower portions of the four sets of supporting arms correspondingly, propellers are fixedly installed at the ends of the output ends of the four sets of motors correspondingly, a liquid storage tank is installed on the lower portion of the lower shell, and a time delay switch, a circuit board and a battery are installed between the upper shell and the lower shell; and a mounting box and a threaded through hole are arranged at the lo