Abstract: The static var generator (SVG) can significantly suppress and achieve real-time compensation. For this advantage, the SVG based on the T three level converter topology is taken as the object of study, the system model is obtained by analysis. It is a kind of model with coupling term. Therefore, a new state feedback compensator is proposed to realize decoupling control, the output current of SVG is guaranteed to track its desired signal without any error. For the DC side capacitor voltage balancing problem has also taken some control. The simulation model verify the effectiveness of the proposed control method. It provides basic guarantee and good platform for the research and development of the three-phase three level SVG.