The utility model relates to an outdoor voltage transformer is insurable mounting tool technical field once, is an outdoor voltage transformer is insurable special vice once, its including can block hang outdoor voltage transformer once the body card on the insurable body decide, can compress tightly outdoor voltage transformer once the end cover card of insurable end cover decide, left side pincers handle and right forceps handle, left side pincers handle and right forceps handle pass through the hinge and hinge and be in the same place. The internal and external network physical isolation data exchange device is reasonable and compact in structure, high durability and convenient use, it is through the left pincers handle of control, right forceps handle decides a card with the body card and hangs on once insuring the body, decide a compressed end cover through the end cover card, thereby it installs and removes once insurable end cover bolt fast to be convenient for operating personnel, the operation security has not only improved, the electric wire netting risk because of busbar voltage disappears and causes has effectively been reduced, and the present invention also lightens labor intensity, shortens operation time, and save manpowe, the efficiency of the work of fortune dimension is improved, has safety, and labor -saving, portably, the efficient characteristics.