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Civil aircraft Prognostics and Health Management Ground Support System is the key technology to ensure the safe operation of aircraft, and the architecture is the key to determine the success of PHM technology applications. Based on the analysis and summarization of the typical PHM system architecture, it proposed a design method of PHM ground support system architecture on the basis of SOA (Service-Oriented Architecture) and dual bus technology. The related system has realized the sharing of information resources effectively, and ensured the quality of the system operation service.