The double frequency negative circulating current among MMC three phases increase the voltage fluctuation of capacitor, arm current distortion, system losses and electro- magnetic interference, although they do not influence the outer circuit. Combining carrier phase shifted modulation strategy with sorting algorithm, a circulating current suppression control strategy is proposed without rotating coordinate transformation by adopting proportion resonance integral controller under αβ coordinate. Finally, a MMC-HVDC simulation system is constructed in MATLAB/Simulink and the simulation results show that the proposed strategy is correctness and validity.