Abstract:Digital twin technology is based on the increasing database storage in various industries,combined with the digital means of various industries,constructs the twin model of physical entities in virtual space,and makes a guiding prediction for the development of physical space based on the model combined with virtual space technology.This paper first introduces the origin of digital twin technology,the purpose of digital twin technology,and the layered concept and key technology of digital twin technology,analyzes the specific application based on digital twin technology in all industries at home and abroad,and summarizes the reasons for the emergence of digital twin technology and the problems that can be solved.Then,combined with the existing research results,this paper analyzes the current difficulties of this technology,and provides the future development trend.