Guardrail for building construction

The utility model discloses a guardrail for building construction, and relates to the technical field of guardrails for building construction. The guardrail comprises a base, one side of the base is provided with a telescopic structure capable of adjusting the height and facilitating storage, the side, away from the base, of the telescopic structure is provided with a connecting structure capable of adjusting the connecting distance between guardrails, and the side, close to the telescopic structure, of the base is slidably provided with a fixing nail for fixedly installing a supporting structure. The screw drives the mounting block and the fixing block to ascend to proper positions, the fixing ring is rotated, the screw is fixed, the connecting handle is rotated, the connecting cylinder and the mounting rod are placed in the containing groove, the connecting cylinder and the mounting rod are fixed through the threaded mounting fixing bolt, the guardrail is matched with different occasions to adjust the heigh