Abstract: In accordance with the requirements of the Ministry of Water Resources to accelerate the construction of a modern reservoir operation management matrix of the FEDE(forecasting, early warning, drilling, and emergancy plan), the FEDE business module at Hengshan Reservoir management matrix consolidates data from the “three lines of defense” in rain-water monitoring and forecasting, integrates the integrated forecasting and dispatching model, and two-dimensional surface water dynamics model and other water sector professional models to achieve at enhancing forecasting precision, advancing early warning, digitalizing rehearsals, and ensuring scientifically emergency plan for the reservoir management. In this paper, the flood models in the FEDE module are used to carry out the verification of the reservoir inflow flood forecasting and the analysis of the reservoir downstream flood routing scenario. Results demonstrate that the integrated hydrological forecasting and dispatching model effectively fits historical flood events, with relative biases in flood volume of -10.1% and -8.1% for two specific flood events. Thie can provide a robust scientific basis for flood scheduling at Hengshan Reservoir. Furthermore, the two-dimensional surface hydrodynamic model can facilitate the rapid and precise generation of critical data on flood inundation extent, water depth, flow velocity, and arrival times across various scenarios. This model accurately reflects dynamic changes in flood conditions and significantly supports flood defense strategies.