The invention discloses a compilation method for a large reservoir impounding scheme at the end of a flood based on risk hedging rules, and relates to the field of reservoir scheduling. The method includes the steps of constructing a problem of impounding at the end of a flood; calculating an optimal discharge flow of a target reservoir j at the current stage; discharging according to the obtained optimal discharge flow of the target reservoir j at the current stage in the step S2; and solving for an initial capacity in a future stage by water balance according to the actual reservoir inflow and discharge flow at the end of the current stage, obtaining and executing an optimal discharge scheme according to updated forecast reservoir parameters of the target reservoir j, and updating the capacity of the target reservoir j until the end of the impounding period. The invention solves the problem of a lack of considerations of runoff forecast information and uncertainties thereof in the current changing environment in the prior art. Through the method in the invention, an optimal discharge strategy analytical solution based on real-time forecast is obtained, the impounding risk hedging optimal rules are extracted, a reservoir impounding scheme at the end of the flood with balanced benefits and risks is made, and the requirement of adaptive scheduling under a changing environment is met.