This　study　first　conducted　surface　modification　of　Ag-plated　Tetrapod-like　zinc　oxide　(T-ZnO)　whiskers　with　the　use　of　dopamine　and　prepared　Ag-plated　T-ZnO　whiskers　(T-ZnO@Ag)　by　means　of　chemical　plating,　in　which　AgNO3　solutions　with　different　concentrations　were　used　during　the　preparation.　Micro-structures　of　the　prepared　T-ZnO@Ag　powders　were　examined　to　evaluate　the　effect　of　AgNO3　concentration　on　Ag　plating　performance.　Subsequently,　conductive　Si　rubber　samples　were　prepared,　the　T-ZnO@Ag　powders　were　used　as　fillers,　and　the　effectiveness　of　the　related　electromagnetic　shielding　was　investigated　in　detail.　The　results　showed　that　using　AgNO3　solution　with　a　concentration　of　20　g/L,　a　continuous　Ag　coating-layer　was　observed　on　the　surface　of　T-ZnO　whiskers.　It　was　evident　that,　when　used　as　fillers,　T-ZnO@Ag　has　a　conductive　threshold　and　when　the　mass　fraction　of　the　fillers　exceeded　50　%,　the　T-ZnO@Ag　whiskers　that　were　uniformly　dispersed　in　the　matrix　formed　interconnected　conductive　paths.　In　this　condition,　the　electromagnetic　shielding　effectiveness　of　the　prepared　T-ZnO@Ag/Si　rubber　composite　reached　up　90　dB.