The invention provides a method for evaluating voltage support capability of a multi-infeed DC receiving-end power grid having a STATCOM. The method comprises the following steps: A) establishing a node admittance matrix Y of a receiving-end AC power grid; B) calculating a node impedance matrix Z, wherein the node impedance matrix Z is an inverse matrix of the node admittance matrix Y; C) calculating multi-infeed effective short-circuit ratio at the place of an infeed node to be detected of a direct current transmission system; D) calculating multi-infeed effective short-circuit ratio correction generated when the STATCOM is connected to the node to be detected; E) calculating multi-infeed effective short-circuit ratio of the node to be detected after being corrected; and F) carrying out evaluation on the voltage support capability at the place of the node to be detected. According to the method, the function of the STATCOM is converted into correction of the multi-infeed effective short-circuit ratio to correct the multi-infeed effective short-circuit ratio, so that the problem that the voltage support capability of the multi-infeed DC receiving-end power grid having the STATCOM has no effective evaluation index can be solved.