A method for distributed redundancy control on an intelligent traffic network comprising an intelligent traffic control center and a plurality of communication control nodes constituting a redundant network, characterized in that the method comprises: for each of the communication control nodes, sending, by a communication control node, messages for electing a primary device to the other communication control nodes than the communication control node among the plurality of communication control nodes, and electing a primary device from the plurality of communication control nodes according to preset priorities of the communication control nodes, and backing up data of the communication control node in the primary device, wherein the message for electing a primary device includes the priority of the communication control node; and sending, by the elected primary device, state detection messages to the other communication control nodes than the primary device among the plurality of communication control nodes, and for each of the other communication control nodes than the primary device among the plurality of communication control nodes, when a response message sent by the communication control node to respond to the state detection message indicates that the communication control node can not control any action of a device served by the communication control node, then controlling the action of the device served by the communication control node, and adjusting, by the primary device, control intervals of time of signaling lamps at junctions corresponding to the respective communication control nodes in the redundant network according to traffic flows at the junctions; and when the response message is a message for electing a primary device, then the primary device stopping controlling the device served by the communication control node, and instructing the communication control node to control again the action of the device served by the communication control node, and further backing up the data of the communication control node in the primary device; sending, by the intelligent traffic control center, a detection message periodically to the primary device, and if no response message of the primary device to the detection message is received, determining that the primary device fails, and sending, by the intelligent traffic control center, an instruction to reelect a primary device throughout the redundant network. for each of the communication control nodes, sending, by a communication control node, messages for electing a primary device to the other communication control nodes than the communication control node among the plurality of communication control nodes, and electing a primary device from the plurality of communication control nodes according to preset priorities of the communication control nodes, and backing up data of the communication control node in the primary device, wherein the message for electing a primary device includes the priority of the communication control node; and sending, by the elected primary device, state detection messages to the other communication control nodes than the primary device among the plurality of communication control nodes, and for each of the other communication control nodes than the primary device among the plurality of communication control nodes, when a response message sent by the communication control node to respond to the state detection message indicates that the communication control node can not control any action of a device served by the communication control node, then controlling the action of the device served by the communication control node, and adjusting, by the primary device, control intervals of time of signaling lamps at junctions corresponding to the respective communication control nodes in the redundant network according to traffic flows at the junctions; and when the response message is a message for electing a primary device, then the primary device stopping controlling the device served by the communication control node, and instructing the communication control node to control again the action of the device served by the communication control node, and further backing up the data of the communication control node in the primary device; sending, by the intelligent traffic control center, a detection message periodically to the primary device, and if no response message of the primary device to the detection message is received, determining that the primary device fails, and sending, by the intelligent traffic control center, an instruction to reelect a primary device throughout the redundant network.