Static　tests　were　conducted　to　study　and　analyse　the　growing　situation　of　M.　aeruginosa　and　variation　of　dissolved　total　phosphorus　in　medium　under　laboratory　condition.　The　results　shows　that　the　higher　is　the　concentration　of　exogenous　phosphorus,　the　longer　log　phase　does　M.　aeruginosa　have.　The　limiting　concentration　of　phosphorus　for　growth　of　M.　aeruginosa　is　O.lmg/L.　As　cultured　with　different　phosphorus　source,　the　specific　growth　rate　of　M.　aeruginosa　decreased　in　the　following　order　K2HPO4＞　NaH　2PO4＞Na3PO4.　K2HPO4　is　easily　used　for　M.　aeruginosa　growing.　©　2011　IEEE.