Abstract: A comparative study on fish culture fed only with slurry digested and with chicken manure had been done in this paper. The results showed that the net fish yeilds for the ponds fed only with slurry digested and with chicken manure were 12,120 kg/ha and 3,412.5 kg/ha respectively. The net profit of the former has increased by 2.5 times as compared with that of the latter.The reasons why fish culture with slurry digested can increase fish yield so obviously had been examined by authors through analysis of input-output of energy, N, P and biomass of plankton as well as the changes of DO in fish poud.And they suggested that it is an effective way to raise utilization rate of waste resources and to promote the further development of biogas digester system in rural areas by means of liquid slurry digested to culture fish.