The invention discloses a multifunctional unmanned aerial vehicle (UAV) suitable for electric power patrol inspection, which comprises a UAV main body, an object cavity is arranged in the UAV main body, and a plurality of rotor flying devices are arranged on the sides of the UAV main body. An upper end of that main body of the unmanned aerial vehicle is provided with a waterproof upper shell, anda first waterproof sealing ring is arranged between the waterproof upper shell and the main body of the unmanned aerial vehicle; an electronic component mounting cavity with an opening facing upward is arranged in the middle of the aluminum radiator in the housing cavity. The side surface of the waterproof upper shell is an arc surface, the upper end surface of the waterproof upper shell is a plane, the waterproof upper shell is made of transparent plastic material, the upper end surface of the waterproof upper shell is fixedly provided with an automatic cable grasping manipulator, and the waterproof upper shell is fixedly provided with a thermal infrared imager, a video camera and an ultrasonic flaw detector. The technical scheme has the advantages of reasonable structure design, simple structure, easy assembly and disassembly, good waterproofing performance, long working time, convenient use and normal operation under harsh conditions such as rainy day and night.