This paper presents results on research of utilization ability of dry seaweed food for abalone culture as well as providing a stable food source with high quality and quantity which contributes to develop abalone grow-out culture farm in Bach Long Vy Island. After 166 days of grow-out culture in sea-cages, there was a significant difference in growth rate (length and weight) of abalone in different experiments. The growth rate of abalone in length (42.80 +/- 0.040 mm) and weight (38.00 +/- 0.043 g) was highest when fed 75 percent fresh seaweed + 25 percent dry seaweed and these figures were lowest in experiment that used 100 percent of dry seaweed as food (41.90 +/- 0.066 mm and 35.60 +/- 0.044 g, respectively). The survival rate of abalone was highest value of 94.7 percent when fed fresh seaweed, after that it decreased with increasing of dry seaweed ratio and reached lowest value of 83.3 percent when fed dry seaweed. However, the meat/shell ratio of abalone fed dry seaweed (51 percent) was higher than those fed fresh seaweed (45 percent), but there was no significant difference in nutrient and amino acid composition of meat.