Safety guardrail of building construction elevator shaft

The utility model relates to the technical field of elevator shafts, in particular to a safety protective guard of a building construction elevator shaft, and aims to solve the technical problem thatthe existing safety protective guard of the elevator shaft is difficult to disassemble. The following technical scheme is adopted. Bottom beam, two supports are arranged on the lower surface of the bottom beam; a plurality of fixing cylinders are arranged on the upper surface of the bottom beam, the axis of each fixing cylinder is vertically arranged, the axes of the multiple fixing cylinders arecoplanar, stand columns are detachably fixed to the two fixing cylinders located on the outermost side, vertically-arranged rails are arranged on the two stand columns, and a vertical rod is detachably fixed to each fixing cylinder located on the inner side. Wherein the two ends of the cross rod are respectively embedded in tracks of the two stand columns in a sliding mode, limiting pieces corresponding to the cross rods a