With the development of global warming and rapid urbanization,the torrential floods have been frequent in recent years． According to the maximum daily rainfall data of Ezhou in 1959 and 2016,the worst for calculating rainfall in Ezhou City by Pearson III distribution method to determine Ezhou in 20 years,50 years and 100 years of rainfall,through the analysis of Liangzi Lake in Ezhou and Yaerhu and other medium-sized lakes in different return periods of its peak and flood storage effect,found in Liangzi Lake for 20 years,50 years,100 year flood storage of water were 3．29,3．73 and 4．04 billion m3 respectively,in lake water storage capacity of 87%,83% and 80%,on Yaerhu on 20 or 50 years,the 100 year flood storage of water were 0．39,0．22 and 0．23 million m3,respectively,in lake water storage capacity of 35%,32% and 30%,compared with Ezhou City flood control and drainage standard and discuss the countermeasures of flood control in Ezhou．