针对属性权重和属性值均以联系数形式给出的区间型多属性决策问题,提出了一种基于投影的决策方法.方法依据一般投影分析方法的基本思路,给出了解决属性取值为联系数的多属性决策问题的计算步骤,核心是通过构建并求解每个方案在虚拟正、负理想方案上的投影,进而计算出每个方案对虚拟正、负理想方案的相对一致度,即可得到所有方案的排序结果, Aiming at the multi-attribute decision-making problem of interval-type given by the relation number in the attribute weights and attribute values, a projection-based decision-making method is proposed.According to the basic idea of ​​general projection analysis method, Number of multi-attribute decision making problems, the core of which is to construct and solve the projection of each solution on the virtual positive and negative ideal solutions, and then calculate the relative consistency of each solution to the virtual positive and negative ideal solutions, then Get the results of the sorting of all programs,