The invention discloses a two-stage nine-level inverter based on a bridge type multi-level switched capacitor module. The bridge type multi-level switched capacitor module is applied to a DC-DC converter link, so that a voltage of which the peak is 4 times of that of an input voltage is output, high-efficiency and high power density of a boost link are ensured, and the problem of bus-bar voltage imbalance existing during multi-level inversion is solved; bilateral switch asymmetrical H bridges are applied to a DC-AC converter link, an unequal carrier stacked PWM (Pulse-Width Modulation) controlstrategy is combined, nine-level AC output is realized, the DC bus-bar voltage utilization rate is improved, and the output waveform quality is optimized.