Objective This study aimed to investigate the role of DWI combined with dynamic enhancement in differentiating ovarian tumors with solid and cystic components. Methods The routine MR imaging ,DWI and the ADC values of solid components and dynamic enhancement pictures of 75 ovarian tumors confirmed by surgery and pathology were retrospectively analyzed. Of the 75 patients, there were 39 cystadenomas (benign group) and 36 cystadenocarcinomas (malignant group). The mean ADC value of solid component were calculated and analyzed statistically. Results The mean ADC values of benign group was (1.62±0.24)×10-3mm2 /s, in malignant group was (0.92±0.15） ×10-3mm2 /s,There were found to be significantly different (t=-14.999, P＜0.001).The accuracy was 0.842, sensitivity was 94.44%,specificity was 89.74%,positive predictive value of 89.47%, and negative predictive value of 94.59% when conventional MR imaging combined with DWI. ROC analysis indicated that a cutoff ADC value of 1.26×10-3 mm2 /s was associated with 92.3% sensitivity and 88.9% specificity. Conclusion DWI combined with dynamic enhancement has high clinical application value in differential diagnosis of benign and malignant ovarian tumors, so it should be used in the preoperative examination of ovarian cystic and solid lesions.