Redundant communication topology of distributed equipment

The invention discloses a redundant communication topology of distributed equipment. The redundant communication topology comprises an upper computer and a plurality of communication units connected with the upper computer, wherein each communication unit comprises a plurality of distributed sub-modules; at least one distributed sub-module in each communication unit is connected with a communication receiving port of the upper computer through a communication sending port, and at least one distributed sub-module is connected with a communication sending port of the upper computer through a communication receiving port; and the distributed sub-modules in each communication unit are connected in sequence through communication ports. According to the redundant communication topology providedby the invention, in the communication unit, multi-redundancy communication of a single module is realized, the probability that the distributed sub-module quits operation due to a communication faultis reduced, normal operat