Drum rotating guardrail used "a column four column structure with rotating cylinder combination. Effectively prevent the car through the fence, try driving lane or rollover. Car impact force of the rotating cylinder with decomposition, decompose in vertical direction of the guardrail shock to the parallel to the direction of the guardrail, absorbed by roller effectively and reduce, effectively alleviate the casualties caused by traffic accidents. Protect people's personal safety, provide a kind of brand-new life safeguard!