Abstract: The discharge real-time online study is of great significance to hydrological work in the new era, and is also an urgent problem to be solved at present. Through the single-value analysis and line determination by the fall index method in Lutaizi station in the mainstream of Huaihe River, and configuring the analysis results to the online discharge pushing module of Anhui Province water information, the real- time online discharge data of Lutaizi station was realized. After data verification in 2020 and 2021, the recompilation accuracy requirements can be met. The successful application can provide a reference for solving the problem that manual monitoring can not meet the need of real-time online discharge data in the new situation and can provide a basis for promoting the online research of discharge monitoring.