The best concentration of selenium for culturing Se-rich Spirulina maxima was studied. The results indicated that 40 mg/L Se can greatly increase the alga's growth. The spectra properties of intact cells,phycobilisomes and phycocyanin from Se-rich S.maxima and S.maxima were studied. No difference was found between them. All these results showed that selenium did not affect the absorbance and transfer of solar energy in S.maxima.