The invention discloses a method for determining the risk degrees of mutual influence of multi-infeed alternating current-direct current system inversion stations. The method comprises the following steps that 1, a model corresponding to a multi-infeed alternating current-direct current system is established; 2, disturbance is exerted on a certain inversion station i in the model, so that the voltage Ui of a converter bus i of the inversion station i is reduced by 1%; 3, based on voltage variations delta Uj of other inversion stations j in the multi-infeed alternating current-direct current system, three-phase multi-infeed interaction factors MIIFij of the inversion station i and inversion stations j are calculated; 4, based on the scores of the three-phase multi-infeed interaction factors, the first risk degree Ra and/or the second risk degree Rb of a certain inversion station k are calculated; 5, the first risk degree Ra and/or the second risk degree Rb are compared with reference values (or standard values) so as to determine the risk degrees of one or more inversion stations in the multi-infeed alternating current-direct current system. The method has the guiding effect on finding of potential risks of direct-current station commutation failure and formulation of corresponding prevention measures and can also provide reference indexes for direct-current station address selection.