Protective barrier device convenient to assemble and disassemble

The utility model relates to the technical field of protective railings, and discloses a protective railing device convenient to assemble and disassemble, which comprises a base, a supporting column is fixedly mounted on the base, a sliding column is fixedly connected onto the supporting column, a sliding toothed plate is slidably connected onto the sliding column through a sliding groove, and the sliding toothed plate is fixedly connected onto the sliding toothed plate. An electric telescopic rod is fixedly installed on the sliding toothed plate, and a protective fence device is arranged on the supporting column. The protective fence device is arranged to enable the whole protective fence to stretch and contract to achieve the function of rapid unfolding operation, an electric telescopic rod is adopted to enable a sliding toothed plate to slide to drive a main gear to rotate so as to transmit horizontal force to an auxiliary gear A, a main rod A is pulled at the same time, an auxiliary gear B rotates around