Abstract: China's vegetable production exceeds half of the global production. Due to the high intensity of fertiliser and water inputs, vegetable fields are hotspots for N₂O emissions. By integrating the field N₂O emission observation data and assessing the average N₂O emission, average emission factor, average emission per unit of production, and emission reduction factors of vegetable land in China during the crop growing season cycle, it was found that: The average N₂O emission from vegetable fields in China was 7.32 kg N-hm^-2; it was 19.4% higher in the northern vegetable fields (8.13 kg N-hm^-2) than in the southern ones (6.8 kg N- hm^-2); it was 44.4% higher in the facility fields (7.93 kg N-hm^-2) than in the open ones (5.49 kg N-hm^-2); it was 59.7% and 133.5 % higher in the melon fields (8.43 kg N-hm^-2) than in leafy vegetables (5.28 kg N-hm^-2) and rootstocks (3.61 kg N-hm^-2), respectively. (8.43 kg N-hm^-2) was 59.7% and 133.5% higher than that of leafy vegetables (5.28 kg N-hm^-2) and roots and tubers (3.61 kg N-hm^-2), respectively. In addition, the average N₂O emission factor for vegetable fields in China was 1.48 per cent; 64.1 per cent higher in the south (1.78 per cent) than in the north (1.08 per cent); 30.9 per cent higher in the open air (1.82 per cent) than in the facilities (1.39 per cent); and 7.4 per cent and 60.4 per cent higher in melons and fruits (1.45 per cent) than in leafy vegetables (1.35 per cent) and roots and tubers (0.90 per cent), respectively. Finally, the average yield-scaled N₂O emission from vegetable plots in China were 0.125 kg-t^-1; 41.3 per cent higher in the south (0.145 kg-t^-1) than in the north (0.103 kg-t^-1); 27.5 per cent higher in the open air (0.151 kg-t^-1) than in facilities (0.118 kg-t^-1); 13.1 per cent, and 283.3 per cent higher in melons (0.138 kg-t^-1) than in leafy vegetables (0.122 kg-t^-1) and roots and tubers (0.036 kg-t^-1), respectively. Nationally, the amount of nitrogen applied was significantly and positively related to N₂O emissions or yield-scaled N₂O emission, but had no significant effect on the N₂O emission coefficient; the combination of organic and inorganic fertilisers significantly increased N₂O emissions compared to organic or inorganic fertilisers alone, but had no significant effect on the N₂O emission coefficient; acidic or alkaline soils significantly increased N₂O emissions, and acidic soils increased the N₂O emission coefficient; and over-irrigation Excessive irrigation exacerbated N₂O emissions, emission coefficients and yield-scaled N₂O emission. In summary, the scientific assessment and emission reduction of N₂O emissions from vegetable farms in China should take into account the differences in geographic regions, cultivation methods, vegetable types and different emission parameters. From a national perspective, reasonable reduction of nitrogen fertiliser use, development of water-saving irrigation, and improvement of acidic soils can all contribute to a reasonable reduction of N₂O emissions from vegetable fields.