A method for two-level carrier phase-shifting PWM modulation (CPS-SPWM) with common mode voltage suppression capability suitable for a multi-phase system belongs to the technical field of power electronics. The method is characterized by comprising the steps of setting the phase shifting of a triangular carrier; and carrying out pulse width modulation (PWM) on the k-th sinusoidal modulation wave and the triangular carrier to obtain a control signal step (k) of a bridge arm of the phase. If step(k) is equal to 0, the driving signals of the upper and lower bridge arm power switch tubes of the k-th phase bridge arm are respectively 0 and 1; if step(k) is equal to 1, the driving signals of the upper and lower bridge arm power switch tubes of the k-th phase bridge arm are respectively 1 and 0,so that the suppression of a multi-phase system CMV is realized. For two-level inverter applied to five-phase and six-phase symmetric and six-phase asymmetric motor driving control, a conventional SPWM modulation method and a CPS-SPWM modulation method disclosed in the invention are used for simulation and experiment verification. Comparison analysis shows that modulation method provided by the invention has a good CMV inhibition effect in a multi-phase inverter. The method can be applied to any multi-phase system.