双生法是遗传研究的重要方法之一。近年来,我国利用双生法对人类生长发育及一些疾病进行了大量研究。但在对比同卵双生子与异卵双生子的差异性方面仍大多采用平均偶内差和组内相关系数等统计方法。本文将日本东京大学保志宏教授等人创立的订正百分偏差与相似度系数这一双生统计方法介绍如下。平均偶内差是一种传统的双生统计方法。 The twin method is one of the important methods of genetic research. In recent years, China has carried out extensive research on human growth and development and some diseases using twin methods. However, statistical methods such as average even-in-difference and intra-group correlation coefficient are still used to compare differences between identical twins and dizygotic twins. In this paper, the twin statistics method of the revised percentage deviation and similarity coefficient established by Prof. Bao Zhihong of the University of Tokyo in Japan is introduced as follows. The average even intra-difference is a traditional twin statistic method.