Abstract: With the global extreme climate becoming more frequent, more uneven temporal and spatial distribution of the water resources has resulted in an increasing contradiction between supply and demand of the water resources. In order to make full use of the reservoir water resources and develop the reservoir's engineering benefit, analyses and studies of the control scheme of the flood control level for the Yanshan reservoir have been carried out by using a prestorage and predischarge method. First, taking the downstream flood control safety into account, with the help of the rainfall and flood forecast information, the upper limit of the flood control level was determined by the prestorage and predischarge scheme; then based on the dam safety, considering reservoir ultimate discharge capacity, the highest flood control level during the major flood period and post-freshet period was determined. Comparing with the original flood control level of 104.2 m, the new flood control level considering flood forecast information can be adjusted to 104.77 m, and the flood control level considering the rainfall forecast information can be adjusted to 105.36 m. The calculation and analysis results show that the adjusted dynamic flood control level of the reservoir, with a slight influence upon the dam safety and downstream flood control safety, can greatly improve the utilization rate of the water resources, hence applicable and implementable.