Objective:It is to approach the pathogenic factor,clinical feature,pathologic character and prognosis of Uterine leiomyosarcomas (LMS). Methods:Clinical data of 10 patients with LMS were col ected from March 1990 to December 2011. The symptoms,signs,finding during operation of the patients were analyzed.Results:In 10 cases of uterine leiomyosarcoma,1 case is cel ular leiomyoma of uterus ( CLU) by fast-frozen biopsy;bizarre nuclei leiomyoma in 2 patients. Smooth muscle tumors of uncertain malignant potential in 2 patients. We needed fibroids removed again after additional surgical treatment. Conclusion:For intraoperative diagnosis of borderline patients with uterine fibroids uterine sarcoma should be suspected, early diagnosis,early treatment to prevent re-operation to increase the economic and psychological burden of patients,improved patient outcomes.