According to the investigations of biological resources in Lake Taihu during 2006 2007, we calculated that total fishery yield potential of phytoplankton, zooplankton, zoobenthos and aquatic macrophytes in Lake Taihu was about 78494 t. In order to increase fish yields and inhibit cyanobacteria bloom in Lake Taihu, stocking number of silver carp(Hypohthalmichthys molitrix Richardson) and bighead carp(Aristichthys nobilis Cuvier) should be increased to 10 million and 3 million tails, respectively, and the specification should be 20 tails per kilogram. To protect resources of aquatic macrophytes and zoobenthos, the reasonable stocking number of grass carp (Ctenopharyngodon idellus Cuvier), blunt snout bream (Megalobrama amblycephala Yih), black carp (Mylopharyngodon piceus Richardson) and common carp(Cyprinidae carpio Linnaeus) should be 1.5 million, 1.65 million, 80 100 thousand and 25 million tails, respectively. As topmouth cutler such as cutler alburnus could play important roles in controlling miniaturization and singleness of fishery structure and increase added-value of fishery economy, its stocking quantity should be increased to 5 million tails.