The main nutrient components of sea cucumber( Acaudina molpadioidea) were tested and analyzed with routine methods. The results indicated that contents of crude protein,crude fat,moisture and ash of fresh meat were 16. 50 %,0. 20 %,77. 43 % and 3. 69 % respectively. The content of vitamin E in sea cucumber was 218 mg /kg. Moreover,there were abundant trace elements for people in sea cucumber. The content of total arsenic and lead were over standard in the meat of sea cucumber,but decreased significantly after peeling. There were 17 common amino acids in the meat,7 of them are essential amino acids for human. The percentage of essential amino acids was18. 54 % of the total amino acids. Four flavor amino acids was 4. 78 % of the sea cucumber weight which was56. 10% of the total amino acids. The results showed that the main nutrient component of Acaudina molpadioidea was similar to that of Thelenota ananas and Stichopus japonicu. In conclusion,sea cucumber( Acaudina molpadioidea) is a valuable marine biology resource with low fat,rich in collagen and trace elements better nutritive value.