The utility model belongs to the field of medical tools, and particularly relates to a guardrail device. The guardrail device comprises a guardrail body, wherein two ends of the guardrail body are respectively connected with brackets; the two brackets are provided with mounting shafts; mounting holes corresponding to the mounting shafts are formed in the two ends of the guardrail body; a positioning pin is arranged in the mounting hole in one end of the guardrail body, and a groove corresponding to the positioning pin is formed in the mounting shaft at the same end; a spring is mounted between the mounting hole and the mounting shaft at the other end. The guardrail device is simple in structure and convenient to mount and dismount; the spring is hidden inside, so that the damage to a doctor or a patient by the spring can be prevented; the use is convenient and safe, and the appearance is attractive.