There are many reasons for deviation when installing highway guardrail pile drivers, related to geological conditions and construction. How to prevent inclined holes? Here are some suggestions. First, before entering the construction site with the highway guardrail pile driver, one should understand the construction environment and geological conditions through geological reports and core sampling, and select the appropriate piling and drilling scheme according to different situations. Only with a detailed understanding can deviations be avoided. In practice, the drill bucket should be optimized as much as possible, especially by reducing drilling resistance. The central guide tip has a good positioning function that can effectively prevent inclined holes. Using a spiral drill with low drilling resistance and adopting a guided drilling method is a good way to effectively prevent inclined wells. Welding a sleeve consistent with the hole diameter on the spiral drill or double bottom drill body, with a length of about 2m, which can be extended according to different geological conditions, changing the drilling method, and controlling the drilling speed can reduce the occurrence of inclined wells. In addition to geological and construction operation reasons, there is also a measurement issue in the construction process of the pile driver. The general practice is vertical visual inspection, but this method has a large error. It still uses special measuring instruments and equipment for on-site measurement insurance.