Quick consensus bookkeeping method and system based on blockchain alliance chain

The invention aims to provide a quick consensus bookkeeping method and system based on a blockchain alliance chain. The method comprises the following steps that: when a system is initialized, the system generates a sovereignty key used for generating a new block; a node collects trade information and waits for a new block broadcast; after the node receives the new block broadcast, the new block is added into a local block; the node which receives the sovereignty key generates the new block, and a new sovereignty key is created; the new block is broadcast to all nodes of the system; and the new sovereignty key is transferred. By use of the method, through a method that the certain node of the system is randomly selected to transfer the sovereignty key, only a certain node which can not be determined in the system has power and permission for generating the new block at any time, bookkeeping rights are randomly distributed among all honest nodes so as to guarantee that the system can quickly reach consensus wh