Abstract: In response to issues such as inconsistent data source standards, low utilization of financial data, and insufficient digital management and monitoring of railway financial reimbursement platforms, this paper proposed a digital financial reimbursement solution and designed and built a digital platform for railway enterprise financial reimbursement. The paper used data migration, data cleaning and searchable encryption technology to implement various functions such as financial cost analysis, data sharing, risk early warning, trend prediction, etc. It helps enterprises to make intelligent and efficient decisions from the application scenarios of cost, efficiency, decision-making, personnel management and control, improves enterprise efficiency, and provides support for railway enterprises to reduce costs and increase efficiency.