在脲醛树脂胶中加入超细铜粉(Cu)、超细镍粉(Ni)以及石墨粉(CP)导电单元，制备3层结构的落叶松复合胶合板。分析了导电单元不同施加量以及涂胶量对木基复合材料电磁屏蔽效能和胶合强度的影响。结果表明，复合材料的胶合强度达到或超过国家标准。在施加超细铜粉条件下，由于铜粉氧化，胶合板的电磁屏蔽效能为0.00 dB。在施加超细镍粉条件下，电磁屏蔽效能为0.00~10.10 dB；在施加石墨粉条件下，电磁屏蔽效能为528~13.13 dB。导电单元的加入有利于导电网链的形成，但对胶合强度有不利影响，进而不利于胶合板的导电性，因此电磁屏蔽效能是这两个方面综合作用的结果。

Some electroconductive element such as Cu, Ni powder and graphite powder(CP) were added to ureaformaldehyde(UF) resin to make 3layers Larix composite plywood with electromagnetic shielding effectiveness (SE). The effects of different electroconductively elements and resin spreading quantity on electromagnetic shield effectiveness and bond strength of Larix composite plywood was investigated. The results showed that all the bond strength (ST) could meet or exceed the national standard. The SE was 0.00 dB with Cu, the SE was 0.00~10.10 dB with Ni and the SE was 528~13.13 dB with CP. All the models of SE and ST were significant. Spreading the electroconductively element could increase the electroconductive network. On the other hand, it had the adverse effect on ST, then it led to the negative effect on electroconductivity of plywood. Hence, the combined influence of these two parts led to the SE.