Objective: To explore the status of Chronic postoperative inguinal pain (CPIP) in patients with inguinal hernia after tension-free hernia repair and analyze its influencing factors. Method: 408 patients with inguinal hernia who were scheduled to undergo tension-free hernia repair and were admitted to our hospital from March 2022 to February 2025 were selected as the research subjects. All patients were followed up for 3 months after the operation. The occurrence of CPIP in patients 3 months after surgery was evaluated using the Visual analogue scale (VAS) for pain, and the patients were divided into the occurrence group and the non-occurrence group based on whether CPIP occurred at 3 months after surgery. Collect and compare the general information of the two groups. Logistic regression was used to analyze the influencing factors of postoperative CPIP in patients with inguinal hernia. Result: During the 3-month follow-up, among 408 patients with inguinal hernia, 10 were lost to follow-up. Among 398 patients, 60 developed CPIP, with an incidence rate of 15.8% (60/398). There were 338 patients without CPIP. The proportions of age ≤60 years old, preoperative surgical area pain, use of light patches, postoperative incision infection and postoperative acute pain in the occurrence group were significantly higher than those in the non-occurrence group (P < 0.05). Logistic regression analysis showed that age ≤60 years old, preoperative surgical area pain, postoperative incision infection, and postoperative acute pain were independent risk factors affecting the occurrence of CPIP after surgery (OR > 1, P < 0.05), while the use of light patches was a protective factor (OR < 1, P < 0.05). Conclusion: The incidence of CPIP after tension-free hernia repair in patients with inguinal hernia is 15.08%. Age ≤60 years old, preoperative surgical area pain, postoperative incision infection, postoperative acute pain and the use of light patches are all related factors affecting the occurrence of CPIP in patients.