The invention provides a steering engine protection system and method, as well as an unmanned aerial vehicle. The steering engine protection system comprises one or more systems on chip (SOC) and a steering engine, wherein the steering engine comprises a micro-control unit and a motor; the current angle of the motor is obtained by the micro-control unit, and a target angle sent by the SOC is received by the micro-control unit; according to the current angle and the target angle, whether the steering engine has abnormal circumstances including overcurent, locked-rotor and the like or not at present is judged; and when the steering engine has the abnormal circumstance, the micro-control unit sends request data to the SOC, and controls the motor according to a control command generated by the response of the SOC to the request data, so that when the steering engine is in overcurrent, the steering engine is effectively protected from being burned out, and the SOC can generate an early warning prompt according to a feedback signal.