A　modified　direct　method　for　subtracting　axial　scattered　light　was　put　forward,　that　is,　when　the　collimated　transmission　measured,　the　axial　scattered　light　was　deducted　by　a　small　angle　scattered　light　with　the　same　beam　size.　And　mu(t)　values　of　two　different　samples　of　human　whole　blood　were　measured　at　laser　wavelengths　of　488,632.8　and　1341.4nm,　respectively.　It　showed　that　mu(t)　was　different　for　the　same　blood　sample　at　different　wavelength　and　for　different　blood　sample　at　the　same　wavelength.