Aiming at the noise caused by the serious harmonic problem of dual three-phase motora hybrid pulse width modulation technology is proposed. This modulation technology is improved on the traditional continuous maximum four-vector space vector pulse width modulation (SVPWM) algorithm. The four kinds of zero vectors are used effectively and the time sequence of effective vectors is redistributed. The improved SVPWM method is combined with the periodic frequency modulation methodand a new hybrid pulse width modulation technology is proposed. Compared with the traditional continuous maximum four-vectors modulation methodthe modulation technology makes the distribution of switching frequency and its integral multiple harmonic content more uniform at the cost of increasing the switching times only onceand significantly reduces the high-frequency harmonic amplitude of phase current on the premise of ensuring the operation performance of vector control of dual three-phase motor. At the same timethe fluctuation of z1-z2 harmonic sub plane harmonic amplitude is suppressed greatly. The proposed method neither changes the fundamental wave characteristics nor uses additional circuits in the driver. Finallythe effectiveness of the proposed strategy is verified by simulation.