Abstract: Through the analysis of the operational plan used in the Yuecheng Reservoir, a new operational plan which is the operational way through the control of flood peak and flood volume is proposed. This paper proves that the new operational plan holds good operable and is safe for the reservoir itself and the downstream on the flood control. Adopting the new operational plan, the flood level will lower about 1.1m than what the old way does,when the flood recurrence interval is 1000 years:the normal flood control standard of the reservoir will be improved and the flood recurrence interval will be improved from 1000 years to 1600 years;and the flood recurrence interval of the unusual standard will be raised from 2000 years to 2600 years. If the flood control stanlard does not be improved, the new plan will make the limiting level during flood season from 131m to 135m.