Abstract: The purpose of this article is to analyse and probe into the feasibility of the classification dispatch of the flood season limitation level on the PJK Reservoir under the given conditions below: the original designed maximum discharge and maximum level are not changed, and the loss of the flood damage on the lower river is not increased. It is believed that the classification dispatch of the fluctuating flood season limitation level on the PJK Reservoir is feasible provided we enhance the hydrometeor logical forecast and know well the runoff regularity from the upper river and dispatch scientifically.