Lower limiting spare tire up-down regulator

The invention belongs to the technical field of automobile equipment, and relates to a lower limiting spare tire lifter which comprises a lifting table, a winch is arranged in the lifting table, a lifting hole is formed in the bottom of the lifting table, a steel wire rope of the winch penetrates through the lifting hole and extends to the position below the lifting table, and a protection base is arranged at the traction end, below the lifting table, of the steel wire rope. A protection cover is arranged at the bottom of the protection base, positioning sleeves are arranged at the bottom of the lifting table in a circumferential array mode, positioning rods are arranged at the top of the protection base in a circumferential array mode, a multi-stage electric push rod is arranged between the lifting table and the protection cover, a bottom shell is arranged at the bottom of the protection cover, and balls are arranged at the bottom of the bottom shell in a circumferential array mode. The installation space of