The波形guardrail is a movable steel guardrail composed of corrugated steel plates used at the openings of highway median dividers. It consists of two corrugated steel guardrail panels and two upright posts fixed between them. The posts are securely mounted between the panels. During normal highway operation, the guardrail can be easily inserted into pre-set insertion holes at the opening using the posts, providing isolation and protection. It complements the guardrail bands along the highway, maintaining uniformity and aesthetics. In the event of a collision with the vehicle, the corrugated steel panels, with their good impact resistance and energy absorption properties, are not easily damaged, while also offering excellent protection to the vehicle and its occupants.