The invention provides a power-driven steering engine device based on reversing of a position ring and a control method. A signal conditioning circuit performs voltage conversion, filtering and amplitude limiting processing on a control surface drift angle given signal and sends the control surface drift angle given signal into a controller DSP through AD conversion. The DSP outputs a digital controlling signal which undergoes digital isolation and then is sent to a drive circuit to be converted into a power controlling signal. By controlling a main power circuit, a brushless DC motor is controlled to work. The brushless DC motor drives a control surface to deflect through a transmission gear set in order to follow the control surface drift angle given signal. Generating line currents of the brushless DC motor are sampled by a current sensor and fed back to the DSP. An angle sensor connected with the transmission gear set feeds back a current drift angle of the control surface in real time and sends the current drift angle to the DSP. The power-driven steering engine device based on reversing of the position ring and the control method can effectively accelerate frequency responses of the brushless DC motor and improve anti-interference performance of the system.