Aiming at the problems existing in the integration of third-party fault diagnosis system and interactive electronic technical manual (IETM) and the low application level of fault report information in IETM, a method for diagnosing isolation process using fault report data is proposed. Describe the fault report information structure in S1000D, analyze the fault report data mode and its main elements, the fault isolation function of the fault report information is parsed, and the fault diagnosis process is realized through the IETM terminal platform to complete the fault repair. The application results show that this technology has a certain guiding role in the development of practical IETM system.