Currently,　the　illegal　activity　about　counterfeit　commodity　is　increasingly,　this　brings　huge　economic　loss　for　consumer　and　enterprise.　So　it　is　a　critical　problem　for　us　to　protect　our　commodity　from　counterfeit.　The　analysis　of　current　anti-counterfeit　technique　is　given　first,　and　then　combining　the　information　security　with　RFID　technique　theory　get　the　anti-forge　RFID　reader　which　conforms　to　international　standard　The　discussion　about　anti-counterfeit　mechanism　and　the　encrypt　algorithm　are　emphasized　Furthermore　the　realization　Of　anti-counterfeit　reader　prototype　system　based　on　FPGA　is　introduced　according　to　the　discussion.