In today's world of rapid technological development,although the electricity network has become extremely reliable,it is not foolproof.Therefore,in order to improve the reliability of the power supply,it is necessary to carefully select the emergency power supply according to the characteristics of various loads.Through introducing the concept and types of load classification and emergency power supply,the application of different emergency power supplies in glass industry is expounded,which provides thinking and reference for glass factory to choose suitable emergency power supply.