Single-incision laparoscopic transabdominal preperitoneal inguinal hernia repair integrates the advantages of minimal invasiveness and aesthetic outcomes, enabling "scar-free" abdominal wall restoration. It is particularly suitable for patients with scar-hypertrophic diathesis or those with explicit demands for scarless healing. As a classic single-incision preperitoneal repair approach alongside total extraperitoneal repair (TEP), it accounts for merely approximately 10% of clinical applications due to its high technical threshold and steep learning curve. Drawing on practical experience and the requirements of diagnosis-related group (DRG)-based medical insurance payment, this article elaborates on its core technical points in detail: an innovative umbilical "cleft lip-like" incision combined with conventional trocars, balancing concealment and cost-effectiveness; addressing challenges such as limited surgical field of view and instrument interference through maintaining micro-tension, cross-traction, and optimizing laparoscope positioning; utilizing 3-0 barbed suture for "one-handed suturing" to overcome the technical difficulty of peritoneal closure; and standardizing incision disinfection, full-thickness closure, and umbilical plastic surgery to reduce complications. Proficiency in this technique requires repeated training, which can offer patients a superior minimally invasive surgical experience.