基于Ｌｏｎｇｕｅｔ－Ｈｉｇｇｉｎｓ提出的线性随机海浪模型，导出了波面极大值处水质点水平速度的统计分布。分布的形式类似于波面极大值的统计分布，其中引入了一个新的谱宽度参量εｕ为１－ｍ２３ｍ２ｍ４１２。当εｕ趋于零时，导出的分布函数为瑞利分布；当εｕ趋于１时，则为正态分布。在窄谱情形下εｕ趋于１２ε，其中ε为１－ｍ２２ｍ０ｍ４１２，为常用的谱宽度参量 Based on the linear stochastic ocean wave model proposed by Longuet-Higgins, the statistical distribution of horizontal velocity of water particle at the maximum of wave front is derived. The distribution is similar to the statistical distribution of wave maximums, in which a new spectral width parameter εu of 1-m23m2m412 is introduced. When εu tends to zero, the derived distribution function is Rayleigh distribution; when εu tends to 1, it is normal distribution. In the case of narrow spectrum εu tends to 12ε, where ε is 1-m22m0m412, which is the commonly used spectral width parameter