Disclosed is a magnetic flux feedback adjustment current sensing electricity taking device and method. The electricity taking device comprises an iron core, an energy taking winding, a feedback control winding, a rectifier filter circuit, a power distribution circuit and a dynamic feedback control circuit, a transmission conductor penetrates the iron core, the energy taking winding obtains energy from the transmission conductor and is controlled by the power distribution circuit, redundant energy is inputted the dynamic feedback control circuit, a modulated current signal is applied to the feedback control winding by the dynamic feedback control circuit and generates an alternating magnetic field, the direction of the alternating magnetic field is opposite to that of the energy taking winding, so that magnetic flux in the iron core is decreased, power output is decreased, the electricity taking device solves the problems of serious heating, poor adjustability, low control accuracy under change current and the like in high current of a traditional sensing electricity taking scheme and fundamentally solves the problem that excessive energy enters from the energy taking winding under the high current.