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Under the background of equipment diversification and combat, how to effectively and economically support equipment has became an important factor affecting the combat effectiveness of troops. For this reason, western developed countries have formulated a series of international specification on equipment support. Firstly, the data relationship between international specifications is expounded, and mainly introduces the S4000P, which plays a key role in the comprehensive equipment support work. Secondly, the general workflow of preventive maintenance task definition and the methods involved are analyzed, including the system analysis, failure modes and effects analysis, functional failure categorization, preventive maintenance interval analysis. In the end through a brake system as an example of applicability of this method is verified. The results prove the validity of the method, the domestic equipment integrated support related work has a certain guiding significance.