Objective To investigate diffusion weighted imaging and dynamic enhancement findings of the ovarian sclerosing stromal tumor(SST) with 3.0T MRI , in order to improve the accuracy of SST. Methods The manifestation of MRI plain scanning,DWI and dynamic enhancement of 2 patients with pathologically proven ovarian SST were retrospectively analyzed, with a focus on the multiple phases and planes LAVA - Flex dynamic enhancement , DWI with high b value (b value is 1000 s/mm2) and ADC imaging features base on the conventional unenhanced sequences, with GE HDxt 3.0T superconductive MRI. Results 2 cases SSTs were originated from the left ovarits. They were oval-shaped cystic and solid tumors with mixed signal intensities at T1-weighted imaging, T2-weighted imaging and fat-suppressed T2-weighted imaging, which showed from the outer to the inner in turn: low signal intensities rims, the solid components with medium signal intensities ,and the cystic components with the same signal intensities as water. Multiple tiny flow voids tumor vessel could be seen around the rims and solid components. The solid components of tumors displayed the high signal intensities in the high b value DWI, and the average ADC value of 2 cases were 1.79×10-3mm2/s and 1.74×10-3mm2/s respectively. Dynamic contrast-enhanced MR imagings showed the edge solid components of tumors have obviously been enhanced with the shape of papilla or comb at arterial phase, and the venous phase enhancement got diffusion from the edge to the center, delayed phase lesions had continuous enhancement whose ranges were expanded with feature of "Rapid entry and Delayed Exit" on the whole. Conclusion 3.0 T MRI can better reflect the pathomorphism and multiple imaging features such as the hydrone diffusion of SST. Attentively identify MRI characteristic findings of SST can improve correct diagnosis rate of SST.