Abstract:In the process of road engineering design and implementation, the subgrade filling height is often high, which is a relatively unfavorable situation for both the foundation and the filled subgrade. The improper treatment will easily lead to the insufficient overall stability of the road and large post construction settlement. Taking the new project of East Yingchuan Road as an example, through the on-site geological investigation, on-site environmental analysis, and comparison and selection of subgrade treatment methods, combined with the above data and the comprehensive evaluation of the analysis results, the subgrade treatment method of dynamic compaction method is recommended, and the process flow of dynamic compaction method, the technical points in the implementation process and the precautions are summarized. The research results can be referred for the similar projects in the future.