In this paper we study and compare growth pattern of Oratosquilla oratoria and Oratosquilla kempi , evaluate and compare nutrit ive value, and investigate relationship between biochemical composition and growth, reproduction by measuring body length and weight , biochemical composition and content, respectively. Results show that both the body length relation and the body weight relation between two species can be expressed in the signif icant linear correlation, body weight bears power function relation to length, and during the growing period two body shapes are mainly stable. The content s of water, lipid and ash in muscles are not of signif icant difference, except for that of crude protein ( P < 0. 05) . During the test months lipid contents have litt le f luctuation but contents of water, ash and protein are all on the rise. The differences in amino acids( AA) and fatty acid composions in muscles of Oratosquilla oratoria and Oratosquilla kempi were found. The values of AA, EAA and Asp+ Glu Gly of the latter are higher( P < 0. 01) than those of the former, and unsaturated fatty acids of the former are higher than those of the latter.