Method, device and system for electing master node in distributed consistency system

The invention provides an election method, device and system for a master node in a distributed consistency system, the distributed consistency system comprises at least three nodes, and the election method comprises the following steps: a proposal node in the at least three nodes sends project data information to a preset number of receiver nodes; a receiver node in the at least three nodes generates corresponding response information in response to the project data information sent by the proposal node, and returns the response information to the proposal node; and the master node in the at least three nodes synchronizes the target project data information to each slave node in the distributed consistency system. Through the method, master node election is completed by means of a data synchronization mechanism, the system load type caused by introduction of a single set of master node election mechanism is avoided, and a lighter and highly reliable master node election method is achieved. 本说明书提供分布式一致性系统中主节点