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本文在计算机信息防泄复合薄膜屏蔽材料研究中，引入材料设计的思想，运用传输线的理论模型，借助于计算机，对不同材料进行多层屏蔽设计。计算结果表明，非磁性导体间的多层复合，屏蔽效果随分层数的增加而趋于一极大值，但变化值很小；磁性导体的多层复合，屏蔽效果与分层数存在着最佳的匹配关系，并随频率、膜厚、成分变化而变化；金属与铁氧体的复合，仅当屏蔽衰减较大时（膜较厚），铁氧体对屏蔽才起明显作用，分层才有意义。
In this paper, the computer information anti-leakage composite film shielding materials, the introduction of the idea of material design, the use of transmission line theory model, with the help of computer, multi-layer shielding design of different materials. The calculation results show that the shielding effectiveness of multilayer composite with non-magnetic conductor tends to a maximum value with the increase of the number of layers, but the change value is very small. There is the most multi-layer composite, shielding effect and layering number of magnetic conductor Good matching, and with the frequency, film thickness, composition changes and changes; metal and ferrite composite, only when the attenuation of the larger shield (thicker film), ferrite on the shield played a significant role in stratification It makes sense.