The invention discloses a bothway voltage reactive adjusting device, and relates to a high voltage bus. The bothway reactive voltage adjusting device comprises a transformer, an on-load tap-changer, a first circuit breaker, a second circuit breaker, a capacitor bank, an electric reactor, a current transformer, a voltage transformer and a controller. A tap on the transformer is electrically connected with the on-load tap-changer which is electrically connected with the first circuit breaker and the second circuit breaker, the first circuit breaker is electrically connected with the electric reactor, the second circuit breaker is electrically connected with the capacitor bank, the controller is electrically connected with the on-load tap-changer, the first circuit breaker, the second circuit breaker, the current transformer and the voltage transformer, and the on-load tap-changer, the current transformer and the voltage transformer are electrically connected with the high voltage bus. The bothway reactive voltage adjusting device is simple in structure, capable of achieving bothway reactive voltage adjusting, free of flashy flow and current impact, accurate in voltage controlling, capable of effectively improving the voltage stability and the percent of pass of a partial electric network, and capable of enabling a power distribution system to be safer and more stable.