The invention discloses a quantitative evaluation method for influence of large-scale wind power collection on DC power. The method comprises steps of firstly, according to power system power flow andstable data, calculating self-impedance of a large-scale wind power collection bus in the multi-infeed DC receiving-end power grid and mutual impedance between the wind power collection bus and eachDC converter bus, on the basis, calculating an interaction influence factor of the wind power collection bus on each direct current conversion bus, and then quantitatively judging the magnitude of theinfluence of voltage disturbance of the wind power collection bus on each direct current conversion bus according to the magnitude of the interaction influence factor, thereby determining the directcurrent conversion bus which is most influenced by the voltage fluctuation of the wind power collection bus. The method is advantaged in that the interaction influence factor is utilized as a basis for evaluating the influence of the wind power collection bus voltage disturbance on the DC converter bus, the method can quickly and accurately determine the DC converter bus which is most influenced by wind power, provides the reliable basis for dispatchers to reasonably adjust the wind power grid-connected power, and guarantees stable operation of an intensive multi-infeed DC receiving-end powergrid.