Abstract: The results of this paper conform that S.major contains Chlorophyll a, carotenoid and phycobiline, but it is deficient in Chlorophyll b.In addition, we found that the flucrescence spectrum of the alga is very similar to that of higher plant.The pigment-bound of isoperoxidase from S.major disappears.Whereas the pigment-bounds of water-soluble proteins are obvious.They are always stable in spite of the various culture condition where the alga is grown.

Key words: Spirulina major, Pigment, Absorption spectrum, Flucrescencespe-ctrum, The pigment-bound of isoperoxidase, The pigment-bounds of water-soluble proteins