As new technology is adopted in the design, manufacture and use process of aircraft, the development tendency of depot test equipment has become a focus or a hot issue attracting people's attention. The paper analyzes the application of the depot test equipment in foreign army. Aimed at the actual issue of military aircraft depot test equipment, the important status and role of the depot test equipment in our army are discussed. The development of the depot test equipment under two-level maintenance system is also discussed. Finally, the development tendency of the depot test equipment is explored, which is of reference value to the development of our military aircraft depot test equipment.