研究了指标的权重不能完全确定但知道其所在区域的条件下的多指标决策问题 ,给出了方案与理想解的贴近度及其算法 ,按贴近度的大小可以对方案进行排序 .它同传统的决策方法相比较 ,具有需要信息量少 ,简单可靠等特点 .最后用该决策方法分析了一个实际问题 . We study the multi-criteria decision-making problem under the condition of the region where the weight of the indicator can not be completely determined, and give the degree of closeness of the solution to the ideal solution and its algorithm, which can be sorted according to the degree of closeness. Compared with the decision-making method, it has such characteristics as less information needed, simple and reliable, etc. Finally, a practical problem is analyzed with this decision-making method.