Based on the theory of electromagnetic shielding,modeling simulation is carried out to analyze the shielding effectiveness of electromagnetic shielding body and its influence on coupling efficiency of wireless charging system using electromagnetic field simulation software HFSS.Comparison of field intensity before and after shielding is conducted in a point outside the electromagnetic shielding body to analyze the shielding effectiveness.The magnetic field intensity change in a point inside the receiving coil is simulated,and the influence of shielding on mutual inductance and coupling efficiency is analyzed accordingly.The analysis result indicates that electromagnetic shielding measures will reduce the interference of wireless charging system on outside environment,and enhance the system coupling transmission efficiency.The experiment verifies the simulation analysis.