In order to improve the efficiency and accuracy of localization and analysis for ground-based EW equipment damage in wartime,the logical relationship of functional modules is established through the hierarchical analysis of equipment functional structure.And based on physical structure,the relationship is constructed between equipment damage structure modules and functional modules.Then under the normalized rule of equipment damage structure,the construction method of the equipment normalized damage structure modules and its mathematical description model is established.Finally,the construction of a ground-based EW equipment damage structure modules and the logical relationship link of the function units can provide a reference for equipment damage analysis and repair,which also prove the construction method feasible and valid.