The invention provides an electric lifting device for a spare wheel. The electric lifting device for the spare wheel comprises a power module, a switch control module, a spare wheel lifting module, a spare wheel fixing module and a spare wheel bracket module, wherein the power module, the switch control module, the spare wheel lifting module and the spare wheel fixing module are located on an automobile rear floor; the spare wheel bracket module is installed under the automobile rear floor; an installation hole is formed in the automobile rear floor; the spare wheel bracket module is connected with the spare wheel lifting module through the installation hole. When the spare wheel is carried by a vehicle, the fixation of the spare wheel is realized by the spare wheel fixing module and the spare wheel bracket module; when a wheel is replaced, the switch control module and the power module control the operation of a whole mechanism; the cooperation between the spare wheel fixing module and the spare wheel bracket module enables the fixation of the spare wheel to be unlocked; the cooperation between the spare wheel lifting module and the spare wheel bracket module enables the release of a motor control steel wire rope to be realized, so that the spare wheel falls along with a bracket; when the spare wheel is installed, the cooperation between the spare wheel lifting module and the spare wheel bracket module enables the contraction of the motor control steel wire rope to be realized, so that the spare wheel rises along with the bracket; as the whole process is realized automatically, the manpower is liberated and the efficiency of replacing the spare wheel is improved.