Abstract��Abstact: In this paper we used One-factor experimental method on the research in optimum diets of Babylonia lutosa juveniles. We used Crassostrea gigas, Portunus pelagicus, Trachurus japonicas; Penaeus Vanmamei and the larva of Artemia salina as different diets for six experimental groups in a way of feeding in turn each day. In our experiment the water temperature was 28-28.5��. After 30-days feeding experiment the results of the body-length, weight, growth of each day, growth rate of each day and survival rate in our study showed that the feeding effect of Crassostrea gigas was the best, and Portunus pelagicus was the second best. As far as survival rate concerned, the group of feeding Trachurus japonicas was higher than the Penaeus Vanmamei, and the group of feeding larva of Artemia salina was the lowest while other parameter index were comparatively close. The comprehensive parameter index of Babylonia lutosa juveniles feeding by 5 different diets mixed together was the second in all experimental groups. The results of One Way Analysis of Variance indicated that different diets had significant influence on the growth speed of Babylonia lutosa (F>>F crit��P<0.01).