In this paper, a new control strategy is proposed for cascaded H-bridge multilevel APF to stabilize and balance the DC voltages. This control system consists a two-stage controller. The first one is used to stabilize the total DC voltage of each phase, while the second one is provided to balance the DC voltage of each unit. This control strategy is based on the energy exchange between APF and the grid. The simulation shows that the control strategy is an operable plan.