Objective: To explore the feasibility of reducing the specific absorption rate (SAR) and improving the imaging safety in 1.5 T fetal magnetic resonance imaging by using high dielectric materials. Method: The electromagnetic model of maternity pelvis is built in accordance with medical images, and the model of 8-channel body phase array coil is applied to simulate the clinical conventional scanning in the simulation software SEMCAD. Group A consists of general electromagnetic model of maternity pelvis; in Group B, two high dielectric material slices with the thickness of 5 mm, area of 24 cm * 20 cm and relatively dielectric constant of 500 are placed in two sides of maternity pelvis model. The regular 1.5 T MRI is simulated and the transverse section at the maternity pelvis model center is selected as region of interest (ROI). The partial body SAR, maximum fetal local SAR and maximum maternity local SAR are calculated using finite-difference time-domain method (FDTD), the SAR difference and the uniformity of magnetic field distribution are compared in these two groups. Result: The partial body SAR, maximum fetal local SAR and maximum maternity local SAR in Group A respectively are 0.57W/Kg, 0.93W/kg and 4.07W/kg; the partial body SAR, maximum fetal local SAR and maximum maternity local SAR in Group B reduce 24.56% (0.43W/Kg), 10.75% (0.83W/kg) and 10.32% (3.65W/kg) correspondingly. At the same time, the uniformity of magnetic field distribution is not greatly changed, there is no statistical difference of image quality (P>0.05). Conclusion: The high dielectric materials placed in two sides of maternity pelvis can be used to decrease the partial body SAR, maximum fetal local SAR and maximum maternity local SAR in 1.5 T fetal magnetic resonance imaging, and the image quality is not significantly changed.