Comparison of growth between diploid and triploid for crassostrea gigas cultured in Fujian was reported in this paper. The result shows that shell length, shell height,body weight and wet meat weight of triploid were larger 14. 41 %, 7. 66 %, 35. 27 %, and 73.25 % than those of diploid after 17 months culture. During the reproductive period from May to August, growth of body weight and wet meat weight for triploid obviously exceeded those for diploid. In addition, the growth between diploid and triploid cultured in temperate and sxub-tropical zone sea were discussed.