The utility model discloses an unmanned aerial vehicle suitable for severe weather, which comprises an unmanned aerial vehicle main body, and a rotor wing flight device is arranged on the side surfaceof the unmanned aerial vehicle main body; a waterproof upper shell is arranged at the upper end of the unmanned aerial vehicle body, and a first waterproof sealing ring is arranged between the waterproof upper shell and the unmanned aerial vehicle body. A signal lamp device is detachably arranged in the middle of the bottom surface of the UAV body; the signal lamp device comprises a signal lamp holder, at least one LED signal lamp and a wireless remote control switch are arranged on the lower end face of the signal lamp holder, each LED signal lamp is sleeved with a first transparent waterproof cover, and each wireless remote control switch is sleeved with a second transparent waterproof cover. At least one second waterproof sealing ring is arranged on the signal lamp holder and the bottom surface of the unmanned aerial vehicle main body; the waterproof upper shell is of an arc-shaped structure. The technical scheme is reasonable in structural design, simple in structure, easy to assemble and disassemble, good in waterproof performance, convenient to use and maintain and capable of working normally under severe conditions such as rainy days and nights.