Abstract: Planning of lake ecological engineering is not only a simple water pollution control system,but it also involves regulating and distributing of water resources,planning of land utilization,and ecological reconstruction,etc.The authors applied analysis modeling for multiple-objectives decision to the study on planning of ecological engineering in Yanqi Basin of Lake Bosten,and it got an optimum program on ecological engineering in Yanqi Basin by building of planning model,and optimum seeking for multiple-objectives decision analysis.It is of certain directive significance for the planning of other lake ecological engineering.