高铁护栏的保护原理是利用土基、立柱、横梁的变形来吸收碰撞能量，并迫使失控车辆改变方向，回复到正常的行驶方向，防止车辆冲出路外，以保护车辆和乘客，减少事故造成的损失。车辆对其碰撞时，由于护栏有良好的耐撞性能和吸收能量的作用，既不容易被撞毁。
The protection principle of high-speed rail guardrail is to use the deformation of soil foundation, column and beam to absorb collision energy, and force out of control vehicles to change direction and return to normal driving direction, so as to prevent vehicles from rushing out of the road, so as to protect vehicles and passengers and reduce the loss caused by accidents. When the vehicle collides with it, the guardrail is not easy to be damaged due to its good crashworthiness and energy absorption.
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同时又可对车辆和司乘人员起到很好的保护作用。当路面维修或其它原因需要并通时，可方便地把开口处的各组护栏立柱拔出移走，开辟通道，便于车辆通行。护栏的特点是抗冲击性好、成本低、寿命长、安全性更高、绿色环保、防腐性能好，抗老化，美观大方，安装简便快捷等。
At the same time, it can play a good role in protecting vehicles and drivers. When the road surface maintenance or other reasons need to be connected together, it is convenient to pull out each group of guardrail posts at the opening to open a channel for vehicles to pass through. The guardrail is characterized by good impact resistance, low cost, long life, high safety, green environmental protection, good anticorrosive property, anti-aging, beautiful appearance, easy installation and quick installation.
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高铁护栏主要用于高速公路防撞，隔离等功能，是高速公路上经常会使用到的护栏板之一。
High speed rail guardrail is mainly used for highway anti-collision, isolation and other functions. It is one of the guardrail boards often used on expressways.