Abstract: Digital Twin is an emerging information technology that has developed rapidly from concept to practical application in recent years. With unique advantages in realizing real-time interaction and communication between the physical world and the virtual information world, this technology has great application potential in the field of intelligent manufacturing. However, the development and application of digital twin technology will not only profoundly change the world, but also deeply shape human beings themselves. It is urgent to conduct in-depth exploration on the essence, advantages and limitations of digital twin technology at the philosophical level. This paper believes that the digital twin is a "restricted" reality and the externalization of human will, and is a thinking and practical tool for the subject to understand the world; moreover, the digital twin has unique value in improving people's cognitive ability, coping with the uncertainty of complex systems and extending human experience. Finally, this paper points out the limitations of digital twin technology in its thinking mode, the tendency of strong computationism, and the possibility of forming a digital "Ge-stell".