Abstract:Based on the recent development of smart grid in the U. S. ,it focuses on the in - depth analysis and discussion of the existing demand response mechanism. From the user policy,user feedback,automatic demand response and other aspects, the technology trends of smart grid are described. Finally,a new model of demand response mechanism in smart grid is proposed. It can be used to match the renewable generation resources on operator side,and propose an effective and secure solution for parallel operation of renewable generation resources.