坝型优选属于多因素、多方案的复杂决策问题，不仅需要经验丰富的熟悉实际工程情况的专家，而且需要运用客观的分析决策技术。本文综合分析堆石坝坝型选择中的各种影响因素，建立了坝型方案优选的递阶层次结构模型。考虑了层次分析法和熵权法对权重确定的不足，将两者结合起来计算综合权重，并运用TOPSIS法对模型进行求解计算，最终确定优选方案。实际应用结果表明，该方法计算简便、结果可靠，能够为堆石坝坝型优选提供科学的决策依据。

Optimal selection of dam type is a complicated decision-making problem. It needs not only the experienced experts familiar with practical engineering, but also objective decision analysis technology. Comprehensively analyzing various factors affecting the rockfill dam type selection, a hierarchical structure model is established. Considering the defects of AHP method and Entropy method in confirming weight, the two methods are combined together to calculate integrated weight. Then this model is solved using TOPSIS method. Finally the optimum scheme of dam type is obtained. The practical application shows that this method is easy and the results are reliable. It can provide support for making decisions in optimal selection of rockfill dam type.