The Nostoc flagelliforme cell is cultivated on three solid bed-materials,which are coarse sand,fine sand and PA6,added BG110,then the effects of different concentrations of gum arabic,sodium alginate and pectin on Nostoc flagelliforme cell biomass was investigated.The results indicated that adding polysaccharides were all conducive to the growth of Nostoc flagelliforme cell and that the Nostoc flagelliforme cell that uses fine sand as solid interface with 0.3% pectin in BG110 has the fastest growth rate and the most biomass.