The Present work was carried out during 1986-1987. Sixty-one zoobenthic species (including 14 species belonging to aquatic oligochaetes, 25 to aquatic insects, 17 to molluscs and 5 to other taxa) were found. Among them, Branchiura sowerbyi, Limnodrilus hoffmeisieri, Polypedilum sp., Chironomus plumosus, Chaoborus sp., Gyraulus albus, Alocinma longicornis and Bellamya aeruginosa are predominant.The mean density of the zoobenthos in the lake as a whole was 460ind/m² and the biomass was 55.415g/m². The highest density of the zoobenthos was found in winter, while the highest biomass was in autumn. Standing crops of the zoobenthos varied with different subregions of the lake. Population densities revealed a gradual diminution according to the following order:Xiaosihai>Qiaodunhu>Baoankou>Dahu>Biandantang. In terms of biomass, such order was found to be Biandantang>Xiaosihai>Baoankou>Dahu Qiaodunhu.A comparison of the zoobentbos of Baoan lake with that of the other lakes is presented. The possible fishery utilization of the zoobenthic resource in the lake is also discussed.