The invention discloses a multi-axis unmanned aerial vehicle. The multi-axis unmanned aerial vehicle comprises a rack, a power generation device, a
power transmission device, a variable-
pitch device, a control device and multiple rotor devices, wherein the power generation device, the
power transmission device, the variable-
pitch device, the control device and the multiple rotor devices are arranged on the rack; the power generation device is connected with the
power transmission device and used for supplying flight power; the power transmission device comprises a
transmission belt, a transmission shaft and gear boxes, the
transmission belt, the transmission shaft and the gear boxes are sequentially connected, the
transmission belt is connected with the power generation device, and the gear boxes are connected with the rotor devices; each rotor device comprises a rotor head, a
propeller hub and screw propellers, the rotor head, the
propeller hub and the screw propellers are sequentially connected; the rotor heads and the gear boxes are connected; the variable-
pitch device comprises a variable-pitch rod and a steering engine, the variable-pitch rod is connected with the rotor heads, and the steering engine is connected with the gear boxes; the control device is connected with the power generation device, the power transmission device, the rotor devices and the variable-pitch device respectively.