The invention relates to an installation device for a moving quenching cable of a quenching machine tool transformer, and belongs to the technical field of quenching cable installation. The device includes a column installed at one side of a power supply cabinet, the top of the column is fixedly provided with a transverse flat plate, a longitudinal hanger rail is mounted under one end of the transverse flat plate away from the power supply cabinet, a hanging wheel is arranged in the longitudinal hanger rail, a connecting bolt is fixed under the hanging wheel, a rotary support used for hanging a quenching cable is mounted on the connecting bolt, one side of the column is provided with a front end support mounted under the transverse flat plate and capable of inclining and rotating the quenching cable, and a rear end support capable of inclining and rotating the quenching cable is mounted no one side of a quenching machine tool support. The installation device for the mobile quenching cable of the quenching machine tool transformer enables the quenching cable to be in a state of flexible natural swinging motion when working, fundamentally solves the problems that a quenching cable is forcibly dragged, connecting points are easy to become loose, and outer insulating rubber skins are worn, and the device is safe and economical, and achieves satisfying using effects.