The utility model discloses an auxiliary adjustment device is changed to mutual -inductor in high tension switchgear, including work platform, lift platform and: upper and lower position trimming storehouse, position trimming mechanism about inside is equipped with is used for driving lift platform reciprocates, control the position trimming storehouse, position trimming mechanism about inside isequipped with is used for driving work platform controls the removal, front and back position trimming storehouse, position trimming mechanism around inside is equipped with is used for driving work platform carries out the back -and -forth movement. The utility model discloses in the installation or in demolising high tension switchgear in the mutual -inductor work, in the storehouse of can direct access switch cabinet being qualified for the next round of competitions to according to the mounted position at mutual -inductor place, adjustable work platform's preceding, back, left and right position and lift platform's upper and lower position, thus mounted position that can rigid alignment mutual -inductor place, and supplementary artifical completion moves the mutual -inductor into or shifts out the cubical switchboard, adjusts the mounting hole well and demolishs or penetrate bolt, lifting or the process such as carry off.