Nowadays, the traditional mode of plastic surgery is to carry out diagnosis and analysis and surgical design by virtue of doctors’ subjective experience, which lacks objective critical indexes and effective auxiliary means, affecting the surgical effect and safety of surgery. Our department adopts computer-assisted technology to visualize the post-operative effect before surgery, simulation of surgical operation improves the safety of surgery, and high-precision three-dimensional reconstruction helps us to customize a personalized prosthesis that meets the anatomy of the defective part. At present, this technology has been widely used in our department for craniomaxillofacial surgery, facial plastic and cosmetic surgery and breast plastic surgery, and has helped us to complete several cases of difficult and high-risk surgeries. Computer-assisted plastic surgery refers to a new analog simulation and intraoperative navigation system, which provides a new development direction for the development of surgery, with significant superiority and greater application value and development potential. Before surgery, the surgeon can observe the three-dimensional anatomical structure of the area of interest on a monitor or a solid model made from measured data, and simulate possible surgical operations. Computer-aided plastic surgery is mainly used for preoperative design, intraoperative navigation, assisted design of prosthesis and transplantation simulation, and its general steps are: image sampling; spatial three-dimensional position measurement; extraction and processing of body data; three-dimensional display and interactive processing. Efficient and high-precision acquisition of 3D data of the measured object is the basis for realizing computer-aided surgical simulation. We apply the method of computer vision to solve the problem that traditional measurement methods are not suitable for acquiring 3D data acquisition on the surface of a living body, and we apply the tomographic image of CT scanning to establish the 3D information of the internal part of the organ under test. These two methods complement each other and can be used to acquire 3D data information of the organ surface or internal structure respectively according to different needs. After the 3D data are accurately acquired, a computer is applied to process them to obtain a 3D digital model of the human body. On this basis, it can make rational judgment on various possible surgical plans; design and produce the shape and volume of implants or transplanted tissues required for plastic surgery, so that doctors or patients can predict the postoperative effects before surgery; make doctors have a comprehensive understanding of the whole process of surgery before surgery, help formulate scientific, reasonable and efficient personalized surgical plans, and guide them during surgery to improve the success rate and safety of plastic surgery, and improve the complexity and efficiency of plastic surgery. Success rate and safety, visualize the complex surgery and make the surgery a more precise process.