In　this　paper,　the　joint　bandwidth　and　power　allocation　in　cognitive　radio　(CR)　network　based　on　full　duplex　is　investigated.　We　first　formulate　the　optimal　problem　model　of　the　full　duplex　based　CR　(FD-CR)　network,　and　then　the　bandwidth　allocation　for　the　problem　subject　to　bandwidth　constraint　is　derived　by　the　dual　decomposition　algorithm.　Moreover,　the　optimal　power　allocation　scheme　under　power　constraint　is　analyzed.　Simulation　results　indicate　that　the　feasible　of　the　proposed　resource　allocation　scheme　for　FD-CR　network.