Abstract： Objective To explore clinical characteristics and types of gynecological pelvic benign diseases similar to malignant ovarian rumors, and to discuss differential diagnosis of benign and malignant gynecological pelvic benign masses. Methods The clinical data, imaging and laboratory examinations of 131 cases, whose clinical symptoms resembled malignant ovarian tumors but pathologically were diagnosed of benign diseases , were reviewed.Results Many kinds of atypical benign diseases were easily confused with malignant ovarian tumors, such as chronic pelvic inflammatory including chronic salpingitis, pelvic encapsulated hydrops, mbo-ovarian abscess, pelvic abscess, ovarian endometriosis, ovarian endometriosis merging with pelvic inflammatory, abdominal and/or pelvic tuberculosis, tubo-ovarian tuberculosis, eccyesis, ovarian thecoma and hysteromyoma of specific site, for example corpus, cervix and isthmus uteri. Conclusions Evaluation by varying measures can effectively get hold of the clinical characteristics of gynecological pelvic benign diseases. It has important value to identify benign and malignant female pelvic masses in complex clinical settings.