Construction stair protective fence

The utility model provides a construction stair protective fence, and belongs to the field of stair protective fences. A construction stair protective fence comprises a base, a fixing shell is fixedly installed in the base, four clamping bases are arranged in the base in a sliding fit mode, eight second threaded rods are arranged in the base in a rotating fit mode, and four supporting assemblies are arranged among the four clamping bases in a sliding fit mode; one ends of the eight second threaded rods are provided with four extrusion strips in a threaded fit mode, the four extrusion strips are in sliding fit with the four clamping bases correspondingly, a motor is fixedly installed in the fixing shell, and two first threaded rods are fixedly installed at the output end of the motor. Four sliding blocks engaged with the eight second threaded rods correspondingly are arranged on the two first threaded rods in a threaded fit mode. According to the utility model, the motor is arranged to drive the sliding strip