The waste tire has the advantages of low weight and good elasticity,which is a good civil engineering material and has been applied in several projects abroad,however,there are few domestic reports on the application of the waste tier in civil engineering.Based on the treatment for the subgrade differential settlement at the interface between the excavation and filling in a highway,the waste tire was used for reinforcing the subgrade,and the material characteristics,construction organization and process,and sensor layout were introduced.Besides,the vertical earth pressure and the change law of the foundation settlement were systematically analyzed.As China's first waste whole-tire reinforced subgrade project,it provides a foundation for applying and promoting this technology.