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The shared resource management is a very important technical difficulty in integrated avionics processing system. In this paper, a method of logical layered system management of task tree is proposed, and general rules of the shared resource management are given. Concrete examples of the shared resource management are adopted to verify the effectiveness of the method. The experimental results indicate that the proposed method is not only very suitable for the management of PCMs, CFMs, NSMs, etc., but also can solve the problems of other shared resource of IAPS excellently.