Electric SF6 mutual inductor gas on-line processing apparatus and use method

The invention relates to an electric SF6 mutual inductor gas on-line processing apparatus, which comprises an SF6 mutual inductor. A first opening is formed in the lower part of the SF6 mutual inductor and is connected to one end of an air pumping pipe via an air vent valve; the other end of the air pumping pipe is connected to an inlet of an air pump; the outlet of the air pump is connected to a first branch pipe; the first branch pipe is connected to a general pipe and a second branch pipe respectively; the general pip is connected to an SF6 gas bottle via a pressure reducing valve; the second branch pipe is connected to an SF6 gas adsorption tank and a buffer tank in sequence; the buffer tank is connected to a gas adding pipe via a solenoid valve; and the gas adding pipe is provided with an emptying valve and is connected to a second opening forming in the upper part of the SF6 mutual inductor via a gas adding connection pipe and an air inlet valve. The invention further relates to a use method of the electric SF6 mutual inductor gas on-line processing apparatus. According to the invention, safe operation of the electric SF6 mutual inductor is ensured, and on-line treatment, without power failure, of SF6 gas in the electric SF6 mutual inductor is realized.