Currently,with the continuous advancement of aerospace technology,mechanical and electrical products often adopt distributed control strategies for product management.In order to meet the requirements of dis-tributed control,electromechanical products are gradually arranged according to distributed areas,and products with similar functions are centrally installed in the area on the machine according to the system.However,current-ly,airbone product software is mostly upgraded by manually connecting and debugging cables.However,this meth-od is extremely difficult to implement in existing narrow and enclosed areas,resulting in a significant reduction in product software upgrade efficiency.In order to solve existing engineering problems,this article proposes a software online loading method with configurable interfaces,which can achieve online loading by configuring multiple com-munication bus interfaces,breaking the barriers limited by product installation location,and greatly improving the upgrade efficiency of onboard software.