Greenhouse gas emissions studies commonly focus on temperate and subtropical regions. As a result,greenhouse gas emissions from agricultural soils in tropical areas are often neglected. Therefore,greenhouse gas fluxes in a Hainan paddy field under different fertilization regimes were studied. This research provides an accurate assessment of CH_4 and N_2O emissions from paddy fields in China and sound mitigation measures. Through static chamber /gas chromatography techniques,CH_4 and N_2O emissions,global warming potential (GWP),and greenhouse gas emissions intensity (GHGI) in late rice season under five fertilizer treatments were measured. The treatments included: control (CK),conventional treatment (CON),optimized fertilization treatment (YH),optimized fertilization combined with controlled slow-release fertilizer treatment (ZHY1),optimized fertilization combined with controlled slowrelease fertilizer and organic fertilizer treatment (ZHY2). The results showed that the cumulative CH_4 emissions in the CK,CON, YH1,ZYH1,and ZYH2 treatments were 175.70,60.30,63.00,62.80,and 56.60 kg·hm~(-2),and the cumulative N_2O emissions were 0.78,3.40,1.03,1.44,and 0.44 kg·hm~(-2),respectively. Correlation analysis showed that soil temperature and Eh were the main factors driving CH_4 emission. Compared with CK,CON,YH,and ZYH1,the yield of rice in ZYH2 treatment increased by 29.69%,11.81%,6.74%,and 10.36%,respectively. While GWP of ZYH2 decreased by 64.80%,43.23%,12.93%,and 15.15%,and GHGI decreased by 76.49%,52.52%,20.54%,and 23.87%,respectively. Therefore,in terms of yield and greenhouse gas emissions,optimal fertilization combined with sheep manure and slow release fertilizer treatment (ZYH2) is feasible in this region.