The invention relates to a method for evaluating inverter station voltage supporting intensity indexes of stations in a multi-direct-current-fall-point system on the basis of a node impedance matrix. According to the method, the node impedance matrix of a system is calculated, the node injection current change caused by that fact that a reactive compensation device with a certain capacity is input into an appointed station is calculated, changes, caused by changes of injected current, of voltage of all current conversion buses in an inverter station are calculated, and therefore the inverter station voltage supporting intensity indexes VSF of stations can be worked out. The method for evaluating inverter station voltage supporting intensity indexes of the stations in the multi-direct-current-fall-point system on the basis of the node impedance matrix is simple in calculation method and clear in physical significance, and calculation efficiency of the indexes VSF can be greatly improved.