The invention provides a reactive voltage coordinated control method for an extra-high-voltage DC converter and near-field substation and belongs to the technical field of automatic voltage control ofpower systems. According to the method, when each automatic voltage control cycle arrives, whether the DC converter station is in a fault state after unipolar or bipolar blocking is checked, if the converter station is in the fault state, the emergency control of a near-field substation is performed; if the converter station is in a normal operation state, the operation trend of the converter station is determined, and corresponding control strategies are generated for different time periods where the active power of the converter station is located. According to the method, the coordinated control of extra-high-voltage and extra-high-voltage near-field substations is achieved, the repeated switching of reactive power devices in the near-site substation during the process of adjusting a converter station DC active power transmission capacity and the frequent switching of converter station reactive power devices are avoided, and the grid voltage stability and voltage quality are improved.