Abstract:As the foundation and guarantee of Distributed Integrated Modular Avionics (DIMA), Prognostic and Health Management (PHM) has important theoretical significance and application value in realizing DIMA resource organization and system reconstruction, improving system fault tolerance and enhancing system task credibility. On the basis of summarizing the connotation of PHM technology and the architecture of DIMA system, this paper analyzes the characteristics of DIMA task organization and scheduling, and discusses the system reconstruction mechanism of DIMA task-oriented requirements. Then the dynamic reconstruction model of DIMA based on PHM is given. Finally, it was prospected the future development directions of PHM technology in the field of avionics.