Cropland is an important source of the potent greenhouse gas nitrous oxide(N₂O). The cultivated black soils located in Northeast China play a vital role in national grain production. It has been demonstrated that the growth rate of N₂O emissions from Chinese croplands is slowing down but still accelerating in the black soil area of Northeast China. Aiming at comprehensively assessing N₂O emissions and understanding the production mechanisms, in this study, we summarized and characterized the N₂O emission intensity, production processes and influencing factors from the black soils in Northeast China. The results showed that the average N₂O-N emissions from unfertilized and inorganic-fertilizer applied black soils were 0.56±0.29 and 1.49±1.09 kg·hm^–2, respectively. The inorganic fertilizer-N induced N₂O emission factor(EF)was 0.45%±0.42% on average across the black soils in Northeast China. Both the background emissions and the EF values were generally lower compared with those of other uplands in China and black soils in other countries. This was likely due to the limitation of denitrification by labile carbon under normal rainfall conditions, and thus the N₂O emissions were predominately derived from nitrification. It was found that the freeze-thaw cycles could greatly promote denitrification and result in large pulses of N₂O fluxes during spring thaw, which might dominate the annual emissions. Compared with croplands in other regions of China, studies on the N₂O emissions from black soils in Northeast China are largely limited. In future research, the in-situ observations of N₂O emissions from black soils in different regions of Northeast China should be strengthened, and the mechanisms involved in freeze-thaw induced N₂O emissions should be clarified. This will facilitate the evaluation of the response of N₂O emissions from black soils to global climate change. Also, there is a need to strengthen researches on the effects of crop residue returning, manure application, etc. on N₂O emissions, to facilitate the development of win-win strategies for enhancing soil quality and simultaneously reduce N₂O emissions from black soils.