Power demand response can fully mobilize demand side flexibility, effectively promote interaction between source and load, and will play an important role in the construction of new power system. Firstly, the policy and practice of demand response in recent years are combed, and its progress and effectiveness in ensuring security and promoting consumption are analyzed；Then, combined with the period of power system transformation and transformation, the new situation and requirements of power demand response development are analyzed. Finally, some policy suggestions are put forward to innovate and optimize the power demand response.