本文以某基础工程设计中桩型变更技术经济分析为例，说明在基础设计中必须考虑各种可能的方案，从质量可靠性、对邻近环境的影响、施工效率及工程造价等方面进行综合技术经济分析后，方能选择最佳方案，进行优化决策。 This paper takes the technical and economic analysis of the pile type change in a basic engineering design as an example to illustrate that various possible solutions must be considered in the basic design, and comprehensive technologies should be carried out in terms of quality reliability, impact on the neighboring environment, construction efficiency, and project cost. After economic analysis, we can choose the best solution and make optimization decisions.