Generalization of support equipment is the very important way to reduce the scale of supportment and maximize the effectiveness of supportment. Selection of generalization support equipment is to select qualified suppliers and models from carrying out initial use and evaluation in the real use environment. This paper aims at the requirement of equipment system''s support capability .Firstly, establish the evaluation index system of general support equipment capacity. Secondly,design the experimental scheme and process suitable for evaluation from analysing the design requirements and principles of competitive test. At the same time,give the general process of how to convert of the evaluation. At last,establish the method to determine the weight of unified and bidding test based on relevance degree.