为提高测量精度并减少所需资源,提出一种近似的测量流长度分布的方法.通过分析产生一个定长原始流的概率分布,并考虑流的重尾特性对其产生的影响,给出了近似测量流长度分布的测量模型.理论分析和实验结果均表明,该方法在使用抽样技术条件下,可以准确对流长度分布作出统计,满足实际测量需要. In order to improve the measurement accuracy and reduce the resources required, an approximate method of measuring the distribution of the length of the stream is proposed. By analyzing the probability distribution of a fixed-length original stream and considering the influence of the heavy-tailed character of the stream on it, Approximate measurement flow length distribution of the measurement model.Theoretical analysis and experimental results show that the use of sampling technology under the conditions of this method can accurately flow length distribution statistics to meet the actual measurement needs.