In　this　study,　a　thixotropic　agent　was　applied　to　improve　the　aspect　ratio　of　the　silicone　rubber　gasket　and　the　resulting　obtained　through　modification　showed　an　increase　in　aspect　ratio　from　0.26　to　0.91　with　the　relative　to　the　gasket　without　thixotropic　agent.　Compared　with　the　silicone　rubber　without　thixotropic　agent,　the　mechanical　properties　of　the　silicone　rubber　with　thixotropic　agent　were　discussed　and　the　results　revealed　that　the　shift　was　very　small.　In　addition,　using　Ag-coated　Cu　dendritic　powder　as　conductive　fillers,　conductive　silicone　rubber　with　the　resistivity　(0.004　Omega.cm)　was　prepared　comparable　to　the　relative　commercial　products　can　be　used　for　electro-magnetic　interference　(EMI).　The　reliability　of　the　conductive　composites　under　aging　at　85　degrees　C　and　85%　room　humidity　(RH)　in　a　temperature/humidity　chamber　for　48　h　was　also　discussed　and　the　results　showed　that　the　shift　of　the　volume　resistivity　was　almost　negligible　which　can　meet　the　actual　needs　completely.