The embodiment of the invention discloses a tension china bottle replacing device. The device comprises an insulating china bottle cover, a bottle bracket and a locking frame, wherein the bottle bracket is provided with a fixed groove in fit with the insulating china bottle cover; the fixed groove is used for fixing the insulating china bottle cover after the insulating china bottle cover is put on a tension china bottle; the locking frame comprises two insulating connection plates, a cross arm hanging plate and a tightener hanging plate; the two insulating connection plates are arranged in parallel and then are connected with the cross arm hanging plate and the tightener hanging plate to form a rectangular frame; the cross arm hanging plate is provided with a cross arm connection portion for being locked and connected with a right-angle hanging plate or a spherical hanging ring on a cross arm; the tightener hanging plate is provided with a tightener connection portion for being connected with a tightener; and the bottle bracket is detachably connected with the two insulating connection plates respectively. The device has the following beneficial effects: good balance can be ensured in the process of detaching the tension china bottle by arranging the two insulating connection plates, thus the working efficiency of detaching the tension china bottle is improved; and besides, the balance of the operators can be well ensured, so the safety of the operators can be improved.