The utility model discloses a high-voltage automatic electrified adjustable reactor. The high-voltage automatic electrified adjustable reactor is characterized by comprising at least one group of reactors, wherein each group of reactors is connected in series and vertically arranged in a block building mode and comprises an iron core and a high-voltage coil wound on the outer side of the iron core. The iron core comprises a fixed iron core and a movable iron core, wherein the movable iron core is directly connected with a movable iron core connecting device, the movable iron core connecting device is arranged on a sliding guide rail, and a control mechanism controls linear motion of the movable iron core connecting device along the sliding guide rail. The automatic adjustment of the reactor under the high-voltage condition is achieved through movement of the fixed iron core and the movable iron core.