In　this　work,　we　report　the　synthesis　of　crystalline　Cu-SSZ-13　catalyst　by　using　different　silica　sources,　including　colloidal　silica　(silica　sol),　gelatinous　silica　(silica　gel)　and　tetraethyl　orthosilicate　(TEOS).　These　samples　were　characterized　by　various　techniques　(SEM,　XRD,　BET,　ICP-OES,　H-2-TPR,　NH3-TPD,　XAFS).　The　sample　prepared　by　using　silica　sol　exhibited　regular　morphology　and　uniform　particle　dispersions.　The　results　also　showed　that　different　acidities　and　Cu　ions　distributions　were　present　on　these　Cu-SSZ-13　catalysts.　The　various　silica　sources　affected　the　physicochemical　properties　and　subsequent　catalytic　performances　in　the　selective　catalytic　reduction　of　NO　by　NH3　(NO-SCR).　Cu-SSZ-13　from　TEOS　showed　obvious　advantage　for　the　catalytic　activity　at　low-temperature　region　(＜　200　degrees　C).　However,　Cu-SSZ-13　from　silica　gel　performed　superior　overall　catalytic　activity　(200-600　degrees　C)　in　the　three　samples.　Furthermore,　Cu-SSZ-13　from　silica　sol　displayed　superior　hydrothermal　stability　after　the　same　hydrothermal　treatment　for　the　three　samples,　despite　of　the　similar　movement　of　Cu2+　ions　under　aging　process.　Thus,　the　choice　of　silica　sol　as　precursor　source　is　more　profitable　for　synthesis　of　Cu-SSZ-13.