Multi-rotor unmanned aerial vehicle

The invention provides a multi-rotor unmanned aerial vehicle which comprises a vehicle shell, a vehicle main body arranged in the vehicle shell and a plurality of rotor assemblies. The vehicle main body comprises a main plate, a controlling module, a positioning device, a battery and a camera device. Each rotor assembly comprises a power unit and a propeller arranged on the power unit. The rotor assemblies comprise the first rotor assembly and the second rotor assembly. The assembly structures of the propellers and the power units in the two rotor assemblies are different. The battery is connected with the power units and supplies electric energy to the power units. The main plate is connected with the positioning device, the power units, the camera device, the battery and the controlling module. The power units are controlled by the controlling module according to received external unmanned aerial vehicle controlling signals. The assembly structures of the propellers and the power units in the different rotor assemblies are different, so different propellers cannot be mounted on the non-corresponding power units when the unmanned aerial vehicle propellers are replaced, and the fool-proof design of the propellers is realized.