The invention discloses a multi-infeed direct current commutation failure quick assessment method, and belongs to the technical field of power system automation. The multi-infeed direct current commutation failure quick assessment method comprehensively considers the interaction influence among multiple loops of direct current, the self operating state and the structure parameter of the direct current, and the capability of the alternating current power grid of supporting a direct current inversion station commutation bus, based on the flow result in the initial operating mode and the structure parameter of the multi-infeed direct current power grid, and can realize quick assessment of the multiple loops of direct current commutation failure risk which may be caused by the three-phase short circuit fault of a multi direct current infeed alternating current power grid on the premise of carrying out no transient stable time domain simulation. The multi-infeed direct current commutation failure quick assessment method can effectively avoid misjudgment caused by depending on voltage drop of the direct current inversion station commutation bus.