Reconciliation method and system based on block chain

The embodiment of the invention provides an account checking method and system based on a block chain. The method comprises the steps that a current block is generated, the current block comprises transaction flow information and a hash value of the transaction flow information, and the current block and blocks corresponding to other transaction flow information form a block chain; and obtaining the transaction flow information from a bank, comparing the hash value of the transaction flow information obtained from the bank with the hash value of the transaction flow information in the current block, and performing account checking according to a comparison result. Therefore, manual reconciliation of business personnel is not needed, manpower and material resources are greatly saved, and meanwhile, the security and reliability of reconciliation are remarkably improved by utilizing the characteristics of decentralization, tamper-proof characteristics and the like of the block chain technology. 本申请实施例提供一种基于区块链的对