Objective To study the diagnostic value of transvaginal ultrasound and magnetic resonance imaging (MRI) in the preoperative staging of endometrial carcinoma. Methods 50 cases of endometrial cancer patients who were admitted into the hospital during Jan. 2013 to Jun. 2015 were selected as the research objects. All the cases were confirmed by operation and pathology. Transvaginal ultrasound and MRI examination were performed before surgery. Taking the operative and pathological findings as control, the diagnostic results of the two kinds of test modes in the preoperative staging of endometrial carcinoma were analyzed. Results Surgical pathologic staging showed that there were 36 cases at stage I and 14 cases at stage II. With postoperative pathological staging as the gold standard, the diagnostic accuracy rates of preoperative ultrasonography for stage I and II were 86.1% and 85.7% while of MRI were 88.9% and 92.9%. The accuracy rates of transvaginal ultrasound and MRI for preoperative staging of uterine endometrial cancer were 86.0% and 90.0%, respectively. The difference between the two groups was not statistically significant (χ2 =0.38, P=0.54>0.05). Conclusion The accuracy rates of transvaginal ultrasonography and MRI in preoperative staging of endometrial carcinoma was higher.