Abstract: Abstract Based on the analysis of the electromagnetic shielding clothing for pregnant women, the anti-electromagnetic property of two electromagnetic shielding vests for pregnant women are tested through specific experiment. According to the actual testing conditions, a simulation model is established by the three-dimensional electromagnetic simulation software Ansoft HFSS to obtain the shielding effectiveness (SE) of clothing. The effects of changes in body shape for pregnant women during pregnancy on the anti-electromagnetic property of clothing are analyzed through the simulation model. The results show that the simulation results are basically identical with the actual measurement results, and the model of testing clothing can be applied for the researches on the protective function for electromagnetic radiation. The study also shows that the changes in body shape for pregnant women will directly cause the increase of bottom opening, and then the anti-electromagnetic property of clothing shows a downtrend. When the bottom opening of clothing increases to a certain degree, the SE values of clothing under the irradiation of electromagnetic waves at different frequencies are very small, that is to say the protective clothing has no function to protect pregnant women from electromagnetic radiation.