突发性洪水具有发生突然、来势凶猛、水量集中 ,洪水过程历时短、难以预报等特点 ,使河流洪峰年际变幅很大 ,用常规方法的设计洪水值偏高 ,不利于水利建设。本文采用基于概率乘法定理的 型乘法频率曲线分析 ,以叶尔羌河为例 ,提出了计算这类河流设计洪水的一种理论和方法。将计算值与P- 型曲线等方法的计算值做了对比分析 ,结果表明 ,耐抗和稳健的 型乘法频率曲线是适合于有突发性洪水发生的河流设计洪水计算 Sudden flood events occur suddenly, ferocious, concentrated water, the duration of the flood is short, difficult to predict and so on, so that river flood peak interannual amplitude greatly, with the conventional method of design flood value is high, is not conducive to water conservancy. In this paper, based on probability multiplication theorem type multiplication frequency curve analysis to Yarkant River, for example, put forward a calculation of such a river design flood a theory and method. Comparing the calculated value with the calculated value of the P-type curve, the results show that the resistant and robust multiplication frequency curve is suitable for the design flood calculation of rivers with sudden flood