To address the problems of large current output harmonic, complex calculation and the need for additional setting of the neutral-point voltage weighting coefficient in conventional model predictive current control strategy for neutral point clamped three-level inverter, a variable extended space vector model predictive current control strategy is proposed. First, based on the deadbeat principle, the voltage vectors are optimized in the rotating 60° coordinate system; then, the duty ratio is dynamically changed according to the magnitude of the amplitude and phase errors between the reference voltage vector and the actual voltage vector, thus synthesizing a variable extended space vector set with reduced candidate voltage vector set to 8; subsequently, by constructing virtual vectors and introducing the neutral point balancing factor, the neutral point voltage weight coefficient is eliminated and has good neutral point voltage balancing ability; finally, the effectiveness of the proposed strategy is validated through experiments.