The invention discloses a dynamic reactive voltage enhancement type control method for an extra-high-voltage direct-current receiving-end power grid. The method comprises the steps of judging a grid voltage stabilization weak node by adopting a voltage stability recovery index which takes node voltage drop as a main part and takes load-side induction motor rotor stall and extra-high-voltage direct-current receiving-end system extinction angle recovery as auxiliary parts; taking the voltage stabilization weak point as a pivot node of a voltage control region, and accurately dividing the dynamicreactive equipment with an obvious voltage support effect by utilizing the dynamic impedance ratio of the voltage stabilization weak point to the dynamic reactive equipment node; and designing a dynamic reactive voltage enhancement control mode based on a power grid whole system dynamic mathematical model and a linear matrix inequality method by taking voltage information of the voltage weak nodeas a direct input quantity of voltage control for the dynamic reactive equipment. The control method provided by the invention effectively improves the direct voltage support effect of the dynamic reactive equipment on the grid voltage stabilization weak point, and has good popularization and application values.