Background: The aim of our present study was to investigate the clinical characteristics, treatment status and complications in women with endometriosis and tube ovarian abscess (TOA) to determine the possible association between TOA and endometriosis.Methods: Medical records were used to analyze the clinical characteristics, treatment and complications. Twenty women who were diagnosed with TOA with endometriosis were compared with 93 women diagnosed as having TOA without endometriosis between January, 2008 and December, 2018. Statistical analysis was performed using SPSS Version 20.Results: In this study, TOA patients with endometriosis were significantly more likely to have a lower age range (20–39years) than the non-endometriosis group (11/20 (55.0%) vs 27/93 (29.0%), p=0.036). In addition, TOA patients with endometriosis were associated with a significantly lower rate of parity (11/20 (55.0%) vs 75/93 (80.6%), p=0.021), higher rates of infertility (8/20(40%) vs 0/93(0%), p=0.000) and a significantly lower incidence of elevated blood platelet counts (5/20 (25%) vs 43/93 (53.8%), p = 0.026). Furthermore, women with endometriosis had greater blood loss (347±445.77 vs 204.67±289.46, p= 0.014) and an increased complication rate (3/20(15%) vs 0/93(0%), p = 0.000). Among the 3 patients who had complications in the endometriosis group, 2 patients had septic shock and 1 patient had intestinal obstruction. And 1 case who had septic shock followed by IVF treatment. There was no significance difference on other factors.Conclusions: The present study indicated that endometriosis did not increase the difficulty and time of treatment in patients with TOA, but increased bleeding during surgery and serious complications. It is suggested that doctors should pay more attention to postoperative treatment and nursing in women with TOA and endometriosis, especially those who have a history of recent infertility treatment and related procedures.