Abstract:the development and change history of national high-tech zones is also a history of policy mechanism evolution. This paper will analyze the logic and law of the evolution of the policy mechanism through the "d-a-t-p" theoretical analysis model of the policy mechanism of the national high tech Zone. The research shows that the evolution of policy mechanism of national high-tech zones presents regular characteristics: the demand trigger mechanism changes from national strategy to individual innovation demand; The goal oriented mechanism changes from point reform breakthrough to surface radiation drive; Tool implementation mechanism changes from single tool to multi tool; The performance evaluation mechanism has changed from economic single dimension to high-quality comprehensive dimension. Combined with the evolution experience of the policy mechanism of national high tech zones, this paper puts forward countermeasures and suggestions from four aspects: promoting the matching of policy supply and demand, forming a consensus on policy objectives, optimizing the structure of policy tools and unblocking the link of policy performance.