通过数值模拟的方法研究了素混凝土、钢丝网和钢丝网混凝土板对电磁波的屏蔽和吸收性能。首先将模拟得到的素混凝土反射率和透射率曲线和试验得到的曲线进行对比。对两种不同规格的钢丝网进行了数值模拟，并与试验和理论解进行了比较，对不同直径、网径、层数的钢丝网进行了数值模拟。最后研究了钢丝网及钢丝网位置对混凝土反射和透射性能的影响。数值模拟采用三维电磁仿真软件HFSS15.0。相同网径条件下，钢丝网直径越大，反射率越大，透射率越小。钢丝网直径相同的条件下，网径越大，反射率越小，透射率越大。在混凝土中间加入钢丝网对反射率平均值大小影响很小，主要影响反射率曲线的谐振性。

The electromagnetic wave reflectivity and transmissivity of plain concrete, steel wire mesh and steel wire mesh concrete were numerically studied. Firstly, model simulation results were compared with experimental data of reflectivity and transmissivity and the discrepancy was analyzed. Secondly, two different steel wire meshes were simulated and compared with experimental results, and parameters including wire diameter, mesh diameter and number of layers were studied. Lastly, the steel wires and the influence of their positions on the reflectivity and transmissivity were studied. In this paper, a numerical simulation tool Ansoft HFSS 15.0 was used. When the diameters of steel wires are the same, the larger the mesh diameter is, the lower the reflectivity is. Joining steel wires has little effect on the average reflectivity of concrete, but could affect the harmonicity of the reflectivity curve.