The invention provides a process for electrified replacing of a tension-resistant hard tube bus jumper insulator for a +/-800kV extra-high-voltage direct-current line. A method of hard tube bus transferring and drainage line loading is adopted to enable stress of the jumper insulator to be transferred on a force-bearing tool of a hard tube bus lifting system, so that the objective of demounting connecting points at two ends of the jumper insulator and then smoothly replacing the jumper insulator is achieved.