Based on the theory of public policy diffusion, then through comparative analysis on policy texts of the 31 provincial government power lists, this paper explored the diffusion rule of provincial government power list system from such four dimensions as time, space, list content, and diffusion mode. The study finds that the diffusion of power list system presents an obvious “S-shape” curve growth trend over time, from the space perspective, the regional proximity effect of diffusion policy is significant and “Pilot - promotion” is the basic diffusion path; the contents of power list possess dual characteristics of policy imitation and institutional innovation; the diffusion mode is characterized by two differentiated patterns: “combination of power and responsibility” and “separation of powers and responsibilities” in text design, as well as two classification criteria: functional department and power type.