There are uncertain information in real-time flood-control for reservoir, and decision makers often need to adjust the water level, outflow and other constraints to generate different operation schemes for reference. Aiming at this demand, firstly, this article established optimized dispatching model based on POA, which makes the model has better rate of optimization and astringency. Secondly, in order to make the calculation results accord with laws of outflow and have better applicability, the model is combined with the heuristic information considering the forecasting rainfall level. Last, in order to make decision makers can easily adjust the constraints strategy and add more interactivity of the model, the model's method of constraint is refined. Taking Baishan reservoir as the engineering background, the calculation results show that the model can adapt to the changeable decision-making requirements and quickly generate feasible scheme. It can also reduce the maximum water level and maximum outflow, which can be used as a reference.