Abstract: We describes therelationships between length(fork length, carapace length, carapace width and carcass length) and weight for 22 species of fishing resources caught during 2008~2009 in Bohai Bay and conducted a regression analysis of power function. A total of 4 478 individuals belong to 8 order and 16 families. The value of the exponent b in the length-weight relationship ranged from 1.271to 3.316 and was mainly about 2.979.The t-test indicates that10 species of isometric growth pattern, 10 species werein negative algometry and 2 species were in positive allometry. The R2 of length-weight of all species except 4 were larger than 0.81. The present length-weight key for 22 species of fishing resourcesis avaluable tool for fishery managers.