The invention discloses a high-redundancy synchronization method for an intelligent rectifier bridge based on an FPGA and a communication network. The method is suitable for a plurality of intelligentrectifier bridges with parallel outputs. The intelligent rectifier bridge comprises a three-phase rectifier bridge and a controller provided with an FPGA and a CPU. The method comprises the steps that the intelligent rectifier bridge judges the states of a locally accessed three-phase synchronous signal and shares the state of the synchronous signal to all other intelligent rectifier bridges; theintelligent rectifier bridge selects one synchronous signal from the synchronous signals of all the intelligent rectifier bridges as a synchronous working phase according to a synchronous working phase selection rule; and the intelligent rectifier bridge judges whether the three-phase synchronous signal locally accessed to the intelligent rectifier bridge corresponding to the working phase signalhas a synchronous fault in real time or not and reselects the synchronous working phase. According to the invention, the redundancy of synchronous signals is improved, so that the fault tolerance andavailability of the rectifier bridge are improved, and the continuous and stable operation of a power system is ensured; the intelligent rectifier bridges adopt a common synchronous working phase selection rule to select the synchronous working phase, so that the stability of the system is improved.