The so-called marker post, also known as marker post, marker post and marker post, is often used for electric power, communication, gas, tap water, and railway buried pipeline path indication signs. It is a new type of product used for outdoor, green belt, bushes, and pipes on both sides of the jacking pipe, and plays a warning role. It seems that a small marker post will play a great role. The marker post is a kind of vertical ground sign, which is the protector of underground pipes and pipelines. As long as there are pipelines and pipelines in the underground, there must be a highway marker post standing guard to protect the safety of the pipeline, so as to prevent unnecessary losses caused by the digging of the pipeline. If the construction party sees a highway marker post, it will understand that there are pipes and pipelines below, and will pay attention to how to construct so that the underground pipelines will not be damaged.