The utility model discloses a national-provincial interaction extra-high voltage near-zone power grid reactive power compensation device. The device comprises an extra-high voltage bus, a casing, a read-only memory, a storage battery and a reactive power compensator, the extra-high voltage bus is electrically connected with a voltage transformer, a current sensor is installed at the right end of the voltage transformer, and the current sensor is connected with an electric energy metering chip through a wire; a first ventilation opening is formed in the left end of the machine shell, a second ventilation opening is formed in the right end of the machine shell, meanwhile, a cooling fan is installed at the bottom of the machine shell through bolts, the electric energy metering chip is installed in the machine shell through a support, the read-only memory is electrically connected with the single-chip microcomputer, and an expansion interface is installed at the lower end of the single-chip microcomputer. The country-provincial interaction extra-high voltage near-zone power grid reactive power compensation equipment reduces reactive power, improves the power factor of a circuit, and issimple in design, high in efficiency, low in cost and high in control precision.