Abstract: According to current situation of larval abalone breeding production,an 129-days experiment was conducted to test the effects of microencapsulated diet on the growth of crossbred juvenile abalone.The commercially available powder state abalone formulated diet was used as a control.At the 92th day,the abalone shell length of groupⅠand groupⅡ were significantly higher than those of the control fed with powder state diet(P<0.05);and at the last day,the abalone shell length and the specific growth rate(SGR) of the abalone shell length of groupⅠwere significantly higher than those of the control and groupⅡ,while no significant difference was found between the control and groupⅡ.The survival rate of the juvenile abalone in groupⅠwas two percents higher than others,but the difference was not significant(P> 0.05).The results indicated that the crossbred juvenile abalone fed with microcapsules diet which accounted for 1/3 or 1/9 ration showed various degree of dominant growth.