Based on the sequence analyzing of the cloned gene Dunaliella salina UDP-glucose Dehydrogenase(DsUGD),it shows that the largest open reading frame is 1452bp,the coding protein belongs to UDP-glucose/GDP-mannose dehydrogenase family.The predicted transmembrane regions structure and signal peptides of the DsUGD show that it has one transmembrane structure and may be excretive.The results of the advanced structure analysis of DsUGD shows that it has a high identity with the previous verdict.