For analysing the possible effects of the Three Gorges Project on fishery resources in the Changjiang River Estuary, the fishery survey was made monthly from September 1985 to August 1986 using two-boat trawling for one hour at each of 30 stations in the surveyed water area. According to the survey data, 63,060 fish/k㎡ of mean density, 812kg/k㎡ of mean biomass and 17,054 ton of abundance in the total area were computed for each month. The seasonal changes in these quantities of fish (the highest in autumn, and the lowest in winter) were showed obviously and trended similarly. The habitat distributions of fishes were not even either,and the concentration areas of fishes often occurred in the northeast and the mouth of estuary. The estuary served as an important nursery ground where juvenile fish accounted for 60% in the yearly catch, which peaked in Aug. and Dec. (80.6% and 70.3% respectively)for 14 commercial fishes. In this paper, the abundance and distribution, the ecological habits and the resouces situation of important fishes are discussed one by one. The quality of fish resources were evaluated. The result indicated that the abundance tended towards declining and the composition of length and age tended to simplifying. The study provides a valuable baseline for analysing the effects of environment variations on fishery resources in the Changjiang River Estuary.