Based on the daily precipitation data of Hanshou, Linxiang and Xiangyin in Dongting Lake from 1990 to 2012,the paper choose generalized extreme value distribution with three parameters and Gumbel distribution with two parameters in detail and took the maximum likelihood method to estimate model parameters, and elaborated the process of extreme daily precipitation of two statistics distribution,and used χ2 chi-square goodness-of-fit test and RMSE to evaluate imitative effect and decide statistical distribution model for extreme precipitation in Dongting Lake,and analyzed the return characteristics of extreme daily rainfall. The results show that the statistical distribution model of the maximum daily precipitation for Dongting Lake is GEV distribution.The difference of return level about maximum daily rainfall in Dongting Lake is obvious. The result can provide scientific basis for the design of local drainage engineering.