The effects of different N fertilizer types on greenhouse gas (GHG) emissions in rice field have been studied by many researchers, however, the effects of different N fertilizer types on GHG emissions in coastal saline rice filed remains poorly understood. In an effort to evaluate the effects of different types of N fertilizers on global warming potential (GWP) and greenhouse gas intensity (GHGI), a field experiment with four treatments, namely, without N (N0), inorganic N fertilizer (Nu), organic N fertilizer (Nw) and organic-inorganic mixed N fertilizer (Nm) was designed by using the static opaque chamber and gas chromatography method and fully taking the carbon emissions from agrochemical inputs (Ei) and farm operation (Eo) into consideration, in a coastal saline paddy from June, 2016 to October, 2016. The results can provide scientific basis for seeking appropriate fertilization scheme to slow down GHG emissions, in the coastal saline rice field. Results showed that compared to N0 treatment, the cumulative CH_4 emissions were significantly increased by 42.1% (P<0.05), 63.1% (P<0.05) and 67.2% (P<0.05), respectively in Nu, Nm and Nw treatments, and the cumulative N_2O emissions were significantly increased by 83.5% (P<0.05), 78.0% (P<0.05) and 37.8% (P=0.095), respectively in Nu, Nm and Nw treatments. Compared to N0 treatment, GWP was significantly increased by 51.3% (P<0.05), 66.9% (P<0.05) and 70.3% (P<0.05), respectively, in Nu, Nm and Nw treatments. Grain yield were significantly increased by 44.0% (P<0.05), 77.5% (P<0.05) and 38.4% (P<0.05) in Nu, Nm and Nw treatments relatively to N0 treatment, meanwhile, compared to Nu and Nw treatments, grain yield was also significantly increased in Nm treatment (P<0.05). The GHGI in Nm treatment was decreased by 12.3% (P=0.32) and 23.7% (P<0.05) in relation to Nu and Nw treatments, respectively. Therefore, the Nm fertilization scheme is recommended for increasing grain yield and decreasing GHGI simultaneously during the rice production in coastal saline rice filed, by doing comprehensive compare between GWP and GHGI from three different N fertilizer types.