In order to develop the potential of Dictyosphaerium sp. 1A10 in food and feed, the nutrient components and hydroxyl radicals scavenging capacity of Dictyosphaerium sp. 1A10 were analyzed. The results showed that Dictyosphaerium sp. 1A10 was rich in carbohydrates (19.15%), grease (24.56%), ash (12.43%), fiber (12.31%) and protein(18.55%). Simultaneously, the energy of Dictyosphaerium sp. 1A10 was 371 kcal. In addition, the contents of linoleic (15.3%) and linolenic (8.5%) among fatty acids were high, and there were 18 kinds of amino acids in Dictyosphaerium sp. 1A10, which took up 10.16% of dry microalgae. And the content of essential amino acids accounted for 3.2% of that of total amino acid, which proved to be high in score of ratio coefficient of amino acid (SRCAA). Also 8 kinds of essential amino acids were detected which took up 3.2% and were attested to be high in score of ratio coefficient of amino acid (SRCAA).Meanwhile, the contents of VB₁ (2.15 mg/100 g), VB₃ (6.25 mg/100 g), VB₆ (1.31 mg/100 g), VA (2.37 mg/100 g) and VE (5.28 mg/100 g) were the highest among the 7 kinds of vitamins detected. Besides, magnesium (3 517.26 mg/kg), calcium (813.27 mg/kg), iron (301.78 mg/kg) and potassium (9 426.87 mg/kg) were also the highest among mineral elements. In this study,electron paramagnetic resonance (EPR) technique was used to investigate the scavenging effect on hydroxyl radicals of Dictyosphaerium sp. 1A10, and the scavenging rate was 62.62%.To conclude, Dictyosphaerium sp. 1A10 has the potential of developing as food and feed. Furthermore, Dictyosphaerium sp. 1A10 had a strong scavenging effect on hydroxyl radicals detected by electron paramagnetic resonance, and the scavenging rate was 62.62%. Dictyosphaerium sp. 1A10 has the potential of developing as food and feed.