Objective: To observe the incidence and influencing factors of chronic pain after transabdominal preperitoneal (TAPP) repair for inguinal hernia. Methods: A total of 80 patients with inguinal hernia who underwent TAPP repair in the hospital from January 2020 to May 2025 were selected for this study. The Verbal Rating Scale (VRS) was used to evaluate the occurrence of chronic pain after surgery. The patients were divided into the pain group and the normal group. Baseline data and perioperative indicators of the two groups were compared. Multivariate logistic regression was used to analyze the influencing factors of chronic pain after TAPP repair. Results: Among the 80 patients with inguinal hernia undergoing TAPP repair, 35 experienced chronic pain, with an incidence rate of 43.75%. Postoperative VRS score of the pain group was (2.25±0.13). The duration of surgery and the proportions of preoperative pain, hernia ring defect ≥ 3cm, moderate to severe hernia ring adhesion, and incision infection in the pain group were longer and higher than those in the normal group (P<0.05). Multivariate logistic regression analysis showed that preoperative pain, hernia ring adhesion, and incision infection were independent influencing factors of chronic pain in patients with inguinal hernia undergoing TAPP repair (P<0.05). Conclusion: Patients with inguinal hernia have a higher risk of chronic pain after TAPP repair, which is influenced by factors such as preoperative pain, hernia ring adhesion, and incision infection. Close attention should be paid to patients with these factors.