基于PEO链分子实际键长、链角及○H条件下每一链段处于不同旋转异构态的条件概率 ,用MonteCarlo模拟生成样本链分子 ,计算了PEO尾形链的均方末端矩及其分量、构象数 ,并与完全计算法及理论方法作了比较 ,讨论了尾形链构象数和沿边界方向及法线方向均方末端矩分量随链段数n及键角 的变化。 Based on the actual bond length, chain angle and conditional probability of each segment in different rotational isomers of PEO chains, Monte Carlo simulation was used to generate the sample chain molecules, and the mean square moments and their components of the PEO chain were calculated , Conformational numbers are compared with those of the complete calculation method and the theoretical method. The changes of the number of conformations of the catenary chain and the mean square moments of the catenary along the direction of the boundary and the normal direction are discussed.