The research on the relationship between the terms of airworthiness of transport category aircraft and aeroengine is of great importance to the swift development of airworthiness certification of China. First of all, utilizing some data of the civil aviation regulations, we build the integrated data management system. Then, overlapping contents between CCAR-25 and CCAR-33 are summarized, and the relationship between them are analyzed. At last, the regulations for certain objects about fire-protection system and lubricating oil system are studied.