Abstract: This paper deals with the digestive enzymes activities change of Haliotis diversicolor diversicolor and H .diversicolor aquatilis in different stages .The results suggest that the activities of cellulase increase with the growth of H .diversicolor diversicolor and H .diversicolor aquatilis , while the activities of amylase decrease with the growth of the H .diversicolor diversicolor and H .diversicolors aquatilis .Also , the activity of digestive enzymes in H .diversicolors aquatilis is higher than that in H .diversicolor diversicolor .And the activity of lipase is very low in both H .diversicolor diversicolor and H .diversicolor aquatilis .