In accordance with the importance of burst location choice and combining the principle of determining the burst location of flood risk map,the paper constructed an index system of burst location choice.According to fuzzy complementary matrix,this paper determined the weight of each evaluation applied by improved fuzzy analytic hierarchy process;secondly,this paper aims to get the evaluation value each index through experts grading system;thirdly,according to the weight and the value of indexes,this paper carried out a comprehensive evaluation to alternative dike segment.This paper combined with the breach selection example of the northern section of Zhongwei of Yellow River in Ningxia to demonstrate the scientific rationality of FAHP in the breach selection process of flood risk map.