Damage Assessment and Rush Repair (BDAR) in battlefield is the most important means by improving aircraft survivability and aviation unit's combat capability. In view of the damage modes of military aircraft Electrical Wiring Interconnection System (EWIS), this paper analyzes the corresponding effects caused to happen. While introducing the experience and practices of foreign military and civil aviation, the paper makes a suggestion on the damage detection and the emergency repair of EWIS for military aircraft.