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Large space truss structure is widely used in space crafts. The vibration of this kind of structure may lead to some serious problems. It is necessary to execute vibration control for large space truss structure. In this paper, combine the integrated controllability index and stepwise subtraction method to optimize the position of active rods for large truss structure to solve the vibration control problem. The electro-mechanical coupled equations of the active rod are established. A space truss structure is taken as an example and verification simulations are carried out. The results evaluated by some indexes used in Benchmark questions of vibration control show that the method mentioned in this paper can control the vibration effectively.