Abstract: Ability of avoiding wave,investment,operational effectiveness are highly related to layout of fishing port break-water.Reasonable layout will not only greatly reduce the construction and potecting work,but also improve the condition of avoiding wave.To evaluate a layout of break-water,the paper builds the appraisal target system on society,economy and enviorment in considering impact factor of layout,then, presents a mathematical model in using Analytic Hierarchy Process (AHP) to comprehensively evaluate the layout scheme.The application showed that developed model was feasible and applicable in engineering.