The invention provides a transfer-type real-time battery equalizer with a bidirectional synchronous rectification function, and relates to the technical field of battery management. The transfer-typereal-time battery equalizer comprises a square wave signal generator, an electronic switch, a pulse shaping and driving circuit, a pulse width control circuit, a relative voltage comparison and fuzzycontrol circuit, a synchronous rectification control circuit and an energy exchange circuit. By detecting and controlling relative voltage difference between adjacent batteries in real time, the electric energy transferring equalization function is involved and achieved in real time and is nothing to do with an actual voltage of a single battery and a state of a battery pack, batteries in arbitrary numbers are connected in series, the size of an equalization current is automatically adjusted according to the relative voltage difference, the equalization current and the efficiency are substantially improved by a bidirectional synchronous rectification technology, the problem of short service lifetime caused by non-consistency of the battery pack is solved, and rapid attenuation and thermalrunaway of the battery pack are effectively controlled. The transfer-type real-time battery equalizer is low in cost and long in effective equalization time, the battery capacity utilization rate is improved, and the transfer-type real-time battery equalizer is particularly applicable to a large-capacity power lithium battery pack, a single 2V lead-acid storage battery pack, a supercapacitor bankand the like.