In this study, micro-algae Spirulina (Arthrospira platensis) was cultured in the greenhouse for mass in one cubic meter tanks in 15 ppt salinity, the average temperature of 35 °C in medium and Jordan medium with indirect lighting the sun. When spirulina reached to maximum growth, it was harvested and dried in laboratory conditions with temperature of 30 °C and then dry Spirulina powder was obtained. The chemical composition including protein, fat, moisture and ash were measured by standard methods and profiles of amino acids and fatty acids were determined by HPLC and GC. The amount of chlorophyll pigments and pigment astaxanthin as two important and functional was measured with spectrophotometry and HPLC. Protein and fat was 50.93 and 0.1 percent, respectively. Amino acid tryptophan by 8.8%, and linolenic acid were identified the most common amino acid and fatty acid with 10.37 percent, respectively. In the analysis of pigments, chlorophyll a was 2.097 micrograms per milliliter and the Astaxanthin was 0.21 mg/ kg.