Abstract: Based on molecular identification，the nutritive value of green tide algae from the South Yellow Sea in 2014 was studied in this research. ITS sequence analysis showed that green tide algae in the South Yellow Sea were include in Ulva linzaproceraprolifera（LPP）and Ulva compressa. Nutritive value analysis indicated that green tide algae in the South Yellow Sea was a new safe and healthy sea food providing higher protein （26.46%-29.01%），lower fat（0.76%-0.91%） and higher dietary fiber （4.87%-6.58%）， whose protein content was similar with the attached algae from Zhejiang（independent ttest，P>0.05）. The amino acid composition of protein was balance with 30.31%-33.83% for EAA/TAA，and the flavor amino acids contents were high （42.84%-46.89%）; meanwhile， the compositions of fatty acids in green tide algae from the South Yellow Sea were rich，the contents of alpha linolenic acid was (32.36±6.58)% of total fatty acids. The green tide algae was a safe seaweed food with high protein content (26.46%-29.01%), low fat content (0.76%-0.91%) and high fiber content (4.87%-6.58%).

Key words: South Yellow Sea, green tide algae, molecular identification, nutritive value, nutrition analysis