This paper proposes a closed loop control strategy based on cerebellar model articulation controller the MMC (Modular Multilevel Converter) sub-modules of capacitor voltage balance. MMC circuit based on the multiple child modules cascade system, each module of MMC (SM) is set independent equalizing capacitor voltage circuit. By the intelligent control mode of cerebellar model to control the MMC of cutting module, so as to achieve MMC capacitor voltage balance. The simulation results show that the proposed voltage sharing control strategy based on CMAC effectively achieves the capacitor voltage balance, and improves the stability and anti-interference ability of the system.