Au-supported　13X-type　zeolite　(Au/13X)　was　synthesized　using　a　common　deposition-precipitation　(DP)　method　with　a　solution　of　sodium　carbonate　as　a　precipitate　agent.　Further　testing　was　conducted　to　test　for　catalytic　oxidation　of　CO.　A　study　was　conducted　on　the　effects　of　different　preparation　conditions　(i.e.,　chloroauric　acid　concentration,　solution　temperature,　pH　of　solution,　and　calcinations　temperature)　on　Au/13X　for　CO　oxidation.　In　respect　to　the　catalytic　activity,　the　relationship　between　different　the　preparation　conditions　and　gold　particles　in　13X　zeolite　was　analyzed　using　X-ray　diffraction,　TEM　and　XPS.　The　activity　of　Au/13X　catalysts　in　CO　oxidation　was　dependent　on　the　chloroauric　acid　concentration.　From　XRD　results,　a　higher　chloroauric　acid　concentration　induced　larger　gold　nanoparticles,　which　resulted　in　lower　catalytic　activity.　Results　revealed　that　higher　temperatures　induced　higher　Au　loading,　homogeneous　deposit,　and　smaller　gold　clusters　on　the　support　of　13X,　resulting　in　higher　CO　activity.　Furthermore,　a　pH　of　5　or　6　generated　greater　amounts　of　Au　loading　and　smaller　Au　particles　on　13X　than　at　a　pH　of　8　or　9.　This　may　be　a　result　of　an　effective　exchange　between　Au(OH)(2)Cl　(2)　(-)　and　Au(OH)(3)Cl-　on　specific　surface　sites　of　zeolite　under　the　pH＇s　5　and　6.　The　sample　calcined　at　300A　degrees　C　showed　the　highest　activity,　which　may　be　due　to　the　sample＇s　calcined　at　200A　degrees　C　inability　to　decompose　completely　to　metallic　gold　while　the　sample　calcined　at　400A　degrees　C　had　larger　particles　of　gold　deposited　on　the　support.　It　can　be　concluded　from　this　study　that　Au/13X　prepared　from　a　gold　solution　with　an　initial　chloroauric　acid　solution　concentration　of　1.5　x　10(-3)　mol　center　dot　L(-1)gold　solution　pH　of　6,　solution　temperature　of　around　90A　degrees　C,　and　a　calcination　temperature　of　300A　degrees　C　provides　optimum　catalytic　activity　for　CO　oxidation.