In order to explore the effects of different water management schemes on greenhouse gas emission and soil inorganic nitrogen of dry direct seeding rice in the cold black soil region, micro-area test pits were used in the experiment. The effects of dry direct seeding rice on methane (CH4) and nitrous oxide (N2O) emission fluxes, global warming potential (GWP), global warming potential based on yield (GWPy), the contents of ammonium nitrogen (NH+4N) and nitrate nitrogen (NO-3N) in 0～60cm soil profile were studied. The relationships among soil temperature in 0～20cm soil layer, CH4 and N2O emission fluxes and content of NH+4N and NO-3N in 0～20cm soil layer were analyzed. Four treatments were set: flooded irrigation dry direct seeding rice (YH), wet irrigation dry direct seeding rice (SH), arid irrigation dry direct seeding rice (HH) and transplanting flooded rice (CK), and CK as the control. Results showed that the CH4 and N2O emission fluxes in four treatments showed the trend from increasing to decreasing, the CH4 emission peak appeared in the jointing and booting stage, and N2O emission peak appeared in the heading and flowering stage. The cumulative emission of CH4, GWP and GWPy in four treatments from big to small were as follows: CK, YH, SH and HH, the cumulative emission of N2O in four treatments from big to small were as follows: HH, SH, YH and CK. The changes of NH+4N and NO-3N contents in CK, YH and SH were basically consistent in time and profile. In terms of time, the peak of NH+4N content appeared in the middle tillering and the heading and flowering stages, while the peak of NO-3N content appeared in the early tillering stage. In terms of soil profile, the NH+4N and NO-3N content of CK, YH and SH were the highest in 20～40cm and 40～60cm soil layers, respectively. The contents of NH+4N and NO-3N of HH were the highest in 40～60cm and 0～20cm soil layers, respectively. The NH+4N was the most important nitrogen source for CK and YH, and NO-3N was the most important nitrogen source for SH and HH. The soil temperature of 5cm, 10cm, 15cm and 20cm soil layers (T5, T10, T15 and T20) of four treatments showed the tendency that firstly increased and then decreased. The T5, T10, T15 and T20 of CK, YH, SH and HH were positively correlated with CH4 emission flux and NH+4N content. In YH, the T15 and T20 were positively correlated with N2O emission flux and negatively correlated with NO-3N content. In SH and HH, the T5, T10 and T15 were negatively correlated with N2O emission flux and positively correlated with NO-3N content. In YH, SH and HH, the content of NH+4N was negatively correlated with the content of NO-3N. The research results can provide theoretical basis for the mitigation of greenhouse effect and efficient use of soil nitrogen in dry direct seeding paddy field in the black soil region of northeast China.