The development of blockchain technology has driven improvements in the traceability of corporate financial data. To effectively track the review and modification of relevant business data by responsible parties in financial reports. This paper integrates blockchain technology with the Delegated Byzantine Fault Tolerance (DBFT) algorithm and Proof of Work (PoW) algorithm to construct a multi-tiered enterprise management secure accounting information system. The DBFT algorithm is used to perform user transaction queries in the blockchain-based relational database, while the PoW algorithm is employed to achieve audit consensus on financial report information, thereby enhancing enterprise financial security. Research shows that the error rate of accounting information in the blockchain-based secure accounting information system is as low as 11.62% across seven nodes, with error handling efficiency reaching up to 93.74%. Performance tests demonstrate a 35%- 466% optimization in business processing, and enterprise application systems achieve a 60%-109% improvement in business efficiency.