本文提出一个非线性不规则波一维概率模型(包含五个参数)——称为推广“正态分布”,给出其参数的估计方法和同正态、Gram-Charlier 级数和 Edgeworth 级数的比较。统计分析和检验表明此分布比上述其它分布对偏态系数和峰态系数适用范围更大和配合风浪观测资料更好.文中还简要地给出多维模型. In this paper, we propose a nonlinear one-dimensional probability model of irregular wave (including five parameters) - called generalized “normal distribution”, and give its estimation method and normality, Gram-Charlier series and Edgeworth series Comparison. Statistical analyzes and tests show that this distribution is more applicable to skewness and kurtosis than the other distributions described above, and is better suited to the wind and wave observations.