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Starting with the concept of effectiveness, this paper deeply analyses the concept of synthetic brigades wartime equipment maintenance support effectiveness, clarifies the differences of similar concepts such as effectiveness, capability and efficiency. On the basis of accurately grasping the meaning of effectiveness, taking the measurement of effectiveness as the breakthrough point, combined with the typical activities of maintenance support of synthetic brigades in wartime, this paper analyses the influencing factors of equipment maintenance support effectiveness of synthetic brigades in wartime, and the three main influencing factors of equipment command efficiency, equipment maintenance efficiency and equipment support efficiency are obtained. On this basis, this paper elaborates the concept of each index, and analyzes its influencing factors. The effectiveness evaluation index system of synthetic brigade wartime equipment maintenance support and is obtained, and the next evaluation work is prospected.