Dentition loss is an oral health problem that seriously affects patients' quality of life. Traditional full-mouth implant techniques rely heavily on surgeons' experience, while in recent years, the introduction of digital technology has effectively improved the accuracy, predictability and minimally invasiveness of dental surgery. This paper systematically reviews the technological evolution of digital implant guides, focuses on the iteration of support methods and guide design, summarizes clinical evidence on improving surgical accuracy, restoration effect and aesthetic performance, and discusses accuracy control strategies and future development trends, so as to provide references for clinical practice.