基于概率设计原理，对三种由短期冰厚观测资料推求极值分布的方法进行了探讨，分析了这三种方法的适用范围。根据ＪＺ２０－２ＭＵＱ平台上测得的１９９７－１９９９年度日冰厚资料，采用上述三种方法推求年极值冰厚的概率分布，并推算了不同重现期的极值冰厚，可为渤海海上结构物设计提供参考。 Based on the principle of probability design, three methods to deduce the extreme value distribution from short-term ice thickness observation data are discussed, and the applicable range of these three methods is analyzed. According to the daily ice thickness data from 1997 to 1999 measured on the JZ20-2MUQ platform, the above three methods are used to estimate the probability distribution of the annual ice thickness and calculate the ice thickness at the extreme values ​​for different periods of return. Structure design for reference.