The influences of biochar and nitrification inhibitor incorporation on global warming potential (GWP) of a vegetable field were studied using the static chamber and gas chromatography method. Compared with the treatments without biochar addition, the annual GWP of N_20 and CH_4 and vegetable yield were increased by 8. 7% -12. 4% and 16. 1% -52. 5%, respectively, whereas the greenhouse gas intensity (GHGI) were decreased by 5. 4% -28. 7% following biochar amendment. Nitrification inhibitor significantly reduced the N_2O emission while had little influence on CH_4 emission, decreased GWP by 17. 5% -20. 6%, increased vegetable yield by 21. 2% -40. 1 %, and decreased the GHGI significantly. The combined application of biochar and nitrification inhibitor significantly increased both vegetable yield and GWP, but to a greater extent for vegetable yield. Therefore, nitrification inhibitor incorporation could be served as an appropriate practice for increasing vegetable yield and mitigating GHG emissions in vegetable field.