随机变量序列的独立性与相依性是概率论中很重要的概念。为了判断基于二元树的随机序列的独立性，我们对基于二元树的随机序列的相依阶数进行了估计。我们给出了它的算法分析和具体实现。-Random variable sequence of independence and dependence is very important concept in probability theory, and In order to judge the independence based on two element tree random sequence, we have estimated the random sequence dependent order which based on two element tree .We give its algorithm analysis and implementation.