Variable lane guardrail

The invention provides a variable lane guardrail. The variable lane guardrail comprises a lane guardrail body 6, a screw rod 5 is arranged in the lane guardrail body 6, a square base 8 is arranged at the bottom of the lane guardrail body 6, the screw rod 5 penetrates through the square base 8 and then is connected with a motor 7, the lane guardrail body 6 and the square base 8 are arranged in a square track 4, and the motor 7 drives the screw rod 5 to rotate and then drives the square base 8 and the lane guardrail body 6 to ascend or descend. When the variable lane guardrail is used, the whole variable lane guardrail is arranged below the ground in advance, and the top of the variable lane guardrail is flush with the ground. When a lane needs to be changed, the motor 7 starts to drive the square base 8 and the lane guardrail body 6 above to lift to the needed height, and the lane is changed. The variable lane guardrail can be controlled to lift during the period of changing the urban road lane, operation is easy, efficiency is high, and road resources are fully utilized. The variable lane guardrail is simple in structure and not prone to damage, and saves much cost and is more environmentally friendly compared with a road mobile guardrail which is exposed to the sun and rain and needs to be frequently replaced.