Abstract: In the roadbed construction of highway engineering, the early roadbed will be destroyed by subsidence. In order to eff ectively improve the bearing capacity of the foundation, reduce the settlement of the roadbed, ensure the quality of the roadbed engineering, and lay a good foundation for the construction, in the roadbed construction of the highway engineering, usually the dynamic compaction method is used to solve the above problems. Research shows that the dynamic compaction method is simple to operate and has obvious eff ects, and it has been widely used in the construction of roadbed projects. Based on this, this article discusses the actual application of the dynamic compaction method in the construction of highway subgrades, analyzes its technical details, and the problems that should be paid attention to in use, in order to provide valuable references and references for more people in the industry.