In this study,local conventional fertilization and irrigation practice was treated as a contrast (CK),field experiment was conducted under reduction of chemical fertilizer (nitrogen and phosphorus fertilizers) to study the absorptive effect of paddy field on nitrogen and phosphorous from pond aquaculture wastewater,and the influences of the irrigated wastewater on quality of surface water and leakage water,and on nutrient absorption of paddy and the yield.Results showed that ammonium(NH+4-N),nitrate nitrogen(NO-3-N),total nitrogen(TN),dissoluble phosphorous(DP),particulate phosphorous(PP) and total phosphorous(TP) in pond aquaculture wastewater were effectively removed by paddy field ecosystem,and the removal rate increased with the reduction of fertilization.The TN removal rate under 100%,80% and 60% of conventional fertilization treatment were 251%,389% and 505%,while the TP removal rate were 564%,712% and 762%,respectively.The main forms of nitrogen and phosphorus removed were NH+4-N,NO-3-N and PP.In addition,the mass concentration of NH+4-N,NO-3-N,TN,DP,PP and TP from surface water and leakage water in paddy field showed a declining trend with the reduction of fertilization.Under 80% and 60% of conventional fertilization treatment the mass concentration of TN and TP in surface water were 5.8% and 23.4%,20.8% and 35.5% lower than that from CK,respectively,while in leakage water the number were 18.3% and 27.5%,23.1% and 45.8%.Considering the nutrient uptake and yield,80% of conventional fertilization treatment along with pond aquaculture wastewater irrigation had met the nutrient demands of rice growth; The yield for treatment of conventional fertilization with wastewater irrigation was the highest,which was 2.3% higher than that of CK,while the yield for 80% conventional fertilization treatment was similar to that of CK,however,the yield for 60% conventional fertilization treatment was decreased significantly compared with CK.Take both the economic and environmental benefits under consideration in rice cultivation,it is recommended that fertilization is about 80% of the local conventional fertilization when pond aquaculture wastewater is irrigated into paddy field.