本文引进群体决策的决策个体和决策群体关于供选方案对的偏比度,以及偏比泛函概念.由此,定义了群体在供选方案集上的偏比映射,构造了相应的偏比公理系,并且建立了关于群体决策的偏比度分析的基本理论.最后,给出一个利用偏比映射进行群体排序的方法.特别是,文中表明,满足本文所提出的所有偏比公理的偏比映射是存在的. In this paper, we introduce the concept of bias ratio and the concept of bias function in decision-making groups and decision-making groups of group decision-making.Furthermore, we define the group bias mapping in the alternative scheme set, and construct the corresponding bias ratio Axioms, and establishes the basic theory about the analysis of the bias of group decision-making.Finally, we give a method to use the bias mapping to group the population.Especially, we show that to satisfy all the bias axioms proposed in this paper The mapping is there.