Abstract: To explore the dynamic behavior mechanism between vibrating wheels and compacted pavement during subgrade vibra? tion compaction. To provide theoretical support for continuous compaction monitoring technology and intelligent compaction of pavement. Based on the consideration of the mass of the vibrating soil， a 3-degree-of-freedom vibratory roller-soil coupling dynamic model is established. The nonlinear dynamic response characteristics of the vibratory roller vibration wheel in the compaction pro? cess are studied by analyzing the time-frequency domain plot of the vibrating wheel， Poincaré Map， Largest Lyapunov Exponent， and the dynamic contact force of the wheel-soil. The numerical simulation results show that with an increase of subgrade compac? tion， the motion of the vibrating wheel evolves from a single cycle to a multi-cycle motion， and finally enters a chaotic state. In the process of evolution， the vibration wheel acceleration frequency domain characteristics from the initial single fundamental frequency to the fundamental frequency accompanied by an integral frequency harmonic transition. In the end， the fundamental frequency and 1/2 times the subharmonic are the main parts. After entering the chaotic state， reducing the excitation force and increasing the exci? tation frequency can make the chaotic state degenerate to approximately a single cycle motion. Among them， the response charac? teristics of reducing the excitation force are weak 1/3×，2/3× and high harmonics in the frequency domain response. Among the response characteristics of increasing the excitation frequency， the single cycle of the compaction movement of the vibrating wheel is more obvious.