With　regard　to　the　need　of　non-noise　data　for　the　many　existing　chaos-discerning　methods,　the　noise　reduction　method　for　chaotic　time　series　based　on　least　square　support　vector　machine　is　proposed,　followed　by　specific　steps　for　its　application.　The　result　of　emulation　by　Henon　reflection　system　proves　the　effectiveness　of　this　method.　©2009　IEEE.