The research on the flood regional composition of the Xiangjiang River Basin was carried out with different methods, such as the equivalent frequency composition method, conditional expectation regional composition and most likely regional composition methods based on Copula function. Five flood regional composition schemes were worked out. After comparing the results, the conditional expectation regional composition scheme was recommended. The research contributed the basic for water conservancy and hydropower engineering and flood control system construction of the Xiangjiang River Basin.