The invention provides a block chain-based energy system optimization method in complex scenarios after initialization. The optimization problem is solved through the nodes of the whole network, the node with the fastest solution obtains the block bookkeeping right and broadcasts it to the whole network, blocks received by other nodes are verified for correctness, the verified block is the globaloptimal solution of the convex optimization model of the power system, and can be confirmed and broadcasted to the whole network. The energy block chain model proposed by the invention can meet the requirements of the security, openness, throughput and the like of the complex optimization scene of the power system, and has the landing and application capability.