The　influence　of　calcining　temperatures　of　the　Fe/Mo/Al2O3　aerogel　catalyst　on　its　catalytic　activity　for　synthesizing　single　walled　carbon　nanotubes(SWNTs)　was　investigated.　The　main　research　aspects　were　the　physical　and　chemical　changes　of　the　catalysts　under　different　calcining　temperatures,　the　content　of　amorphous　carbon,　and　the　content　and　diameter　and　graphitization　degree　of　SWNTs　synthesized　by　the　catalysts.　The　results　show　that　different　calcining　temperatures　will　change　the　surface　morphology　of　the　catalyst　and　result　in　the　crystallization　of　the　Al2O3　support,　which　influences　the　growth　of　SWNTs.　When　it　is　calcined　at　600　degrees　C,　the　aerogel　catalyst　has　the　highest　catalytic　activity,　the　content　of　amorphous　carbon　is　as　low　as　1.7%,　and　the　content　of　SWNTs　is　as　high　as　54.6%.　SWNTs　synthesized　by　the　catalyst　in　the　raw　products　have　high　quality,　with　narrow　diameter　distribution　of　about　0.86nm.