Abstract: With continuous deterioration of global environment，continuous depletion of energy，how to make full use of energy and development of new energy has become focus of attention of industry.Phase change energy storage technology use phase change materials in physical phase change process from ambient heat（cold）or release amount of heat（cold）to environment，so as to achieve energy storage and release.A electric heating high temperature phase change energy storage device was designed.This device transformed electric energy into heat energy and stored it in storage medium，which was used for heating in greenhouse.Electric heating high temperature phase change energy storage device could balance difference between peak and valley of power grid，improve electricity efficiency，reduce environmental pollution，reduce user operation cost，and provide necessary conditions for management of greenhouse and growth of plants.It had great significance to development of greenhouse industry.