Temporary guardrail mechanism for municipal building construction

The temporary guardrail mechanism for municipal building construction comprises a plurality of stand columns, a first protruding block and a second protruding block are arranged on the two side walls of each stand column respectively, a first inserting groove is formed in the side wall of each first protruding block, and a second inserting groove is formed in the side wall of each second protruding block. A first fixing beam and a second fixing beam are arranged between the two stand columns, first plugs are arranged at the two ends of the first fixing beam and inserted into the first inserting grooves, and second plugs are arranged at the two ends of the second fixing beam and inserted into the second inserting grooves. A plurality of second storage grooves are formed in the bottom of the first fixing beam, protective rods are rotatably connected to the inner walls of the second storage grooves, the protective rods are arranged in a telescopic mode, a plurality of evenly-formed third inserting grooves are fo