In this paper, we investigate the influence of each parameter of Willis chaotic system on the system, and calculate the Lyapunov exponent of Willis chaotic system containing chaotic phase. The analysis of the influence of chaotic phase on the Willis system shows that the random phase can control chaos. We also analyze the differences in intensity among various noises. Finally, the effectiveness of the above method is verified through the analysis of integrating phase portraits and Poincaré surface.