Abstract: Objective: To investigate the causes and treatment of postoperative pain of tension-free inguinal hernia repair,and provide a theoretical reference for the clinical treatment.Methods: The oblique hernia type,onset age,anesthesia and nerve protection in 59 postoperative pain patients treated with tension-free inguinal hernia repair were analyzed.Some measures were implemented to protect and alleviate postoperative pain.Results: The pain in patients with type Ⅲ and Ⅳ hernia was higher than that in patients with type Ⅰand Ⅱ hernia(P< 0.05).The differences of pain between younger patients with local infiltration anesthesia and elderly patients with spinal anesthesia were not statistical significance(P >0.05).Conclusions: The postoperative pain of inguinal hernia tension-free repair is relation to disease type.According to the related factors,the corresponding solution is necessary in preventing or alleviating pain.