A five-leg inverter based on model predictive control (MPC) strategy has a problem of excessive common leg current. This paper takes the dual permanent magnet synchronous motor (dualPMSM) system driven by a fiveleg inverter as the research object, and a common leg current suppression method on the basis of MPC strategy is studied. Combined with the topology of fiveleg dualPMSM system and the algorithm architecture of MPC strategy, the influence of the phase difference of twophase current corresponding to common leg on common leg current is discussed. The common leg current suppression method based on the rotor flux linkage angle difference is applied to MPC strategy, and corresponding experiments are carried out so as to verify and evaluated current suppression effect. Experimental results show that the common leg current suppression algorithm based on MPC strategy can achieve a fine control effect whether under the balanced load or not.