With the increasing number of aircraft functions and design requirements,avionics systems are grad-ually developing towards a comprehensive,modular,and open direction.Integrated Modular Avionics(IMA),as an important development achievement in the field of avionics,represents a high level of modern avionics develop-ment.As an important component of a comprehensive modular avionics platform,a key function of a complex sys-tem has the ability to provide embedded computing functions according to the usage requirements of relevant resi-dent applications,which has been tested and verified to be usable.This article mainly introduces the implementa-tion of embedded functions for a complex system.