House building construction protective fence

The utility model discloses a house building construction protective fence which comprises a first movable plate, a second movable plate and a base, the first movable plate is connected with the second movable plate in a sliding mode, a first fixing base is fixed to one side of the first movable plate, and a connecting base is fixed to the first fixing base. One end of a first screw rod is transversely installed in one side of the first movable plate in a threaded mode, the other end of the first screw rod is connected to a connecting base through a first bearing, a sliding groove base is vertically fixed to the base, one side of a first fixed base is slidably installed in the sliding groove base, and the connecting base is vertically installed on a second screw rod in a threaded mode. The second movable plate adjusts the unfolding length between the first movable plate and the second movable plate under the rotating action of the first screw rod and the sliding action of the first pulley in the sliding groov