In order to investigate the effects of reducing feeding amount of bait and dredging on water environment of aquaculture bay, four treatment groups were set up on the basis of 20 g/m³ stocking density of silver carp and bighead carp,which were B1 (no dredging, half feeding of bait), B2 (dredging, no feeding), B3 (dredging, half feeding of bait), B4 (no dredging, normal feeding of bait). The experimental period was 9 months. Results showed as follows:The total nitrogen concentration, total phosphorus concentration, permanganate index and algae biomass from low to high were B2, B4, B1, B3; B2, B1, B4, B3; B2, B1, B4, B3; B2, B1, B3, B4 (P<0.05), respectively. There was no significant difference in zooplankton biomass (P>0.05). B2 achieved the best results in both the control of nutrient salt and algae.As the aquaculture bay, its main function is to get higher fish production. Under the condition of meeting the requirements of aquaculture water quality, the rational use of the bait should be taken to obtain higher fish production. Therefore, for the treatment of aquaculture water, the reasonable remediation methods should be adopted according to the specific water quality conditions in order to achieve a win-win situation of water quality improvement and aquaculture production.