Efficient consensus protocol method and system for block chain

The invention provides an efficient consensus protocol method and system for a block chain, and relates to the technical field of block chains, and the method comprises the steps: reading an information consensus record of a node sequence, carrying out the decision making through combining an intrusion tolerance model, and determining an elastic protocol based on an intrusion tolerance system; configuring the node sequence based on an elastic protocol; in a preset time interval, reading the acquired information of the interval time zone of the middle node, checking the acquired information with the sent information of the upper node, identifying a difference part, and placing the difference part in a node message queue; asynchronously transmitting the acquired information to a lower node, and determining transmission information in combination with a node message queue; and executing information transmission and consensus management among the node sequences. The problem that due to poor safety and integrity o