Abstract:AES(Airborne electronic suits)are carried in certain structures of military aircrafts, which contribute the relevant EMP/EMH(Electromagnetic Protection/Electromagnetic Hardening) characteristics for the AES. For military aircrafts, the EMP/EMH characteristics of aircraft structures have a great impact on the AES, so the EMP/EMH characteristics of aircraft structures is one of the important parts of its operational integrity. The EMP/EMH concept is attributed from perspectives of both EMC(Electro-Magnetic Compatibility) and the EW(Electromagnetic Warfare), which is followed the concept of electromagnetic hardening or reinforcement. The EMP/EMH of aircraft structures is combined engineering technology and operational tasks. Several typical EMP/EMH measures of aircraft structures are proposed based on the analysis of typical electromagnetic threats, the EMP/EMH characteristics of aircraft structure and the electromagnetic damage mechanism ware analyzed from aircraft structure, which was in order to improve the operational integrity of AES.