In order to achieved quantify research of the watercraft equipment support resources deployment. Using the constraint satisfied problem theory and method, the deployment system of the watercraft equipment support resources in the alongshore islands and islets joint operations is analyzed, as well as the stage, guarantee district and guarantee node are divided, and then the relevant parameters are simplified and constituted. Based on these, the mathematical model are given, which could afford an instruction and reference of the deployment of the watercraft equipment support forces application in the wartime.