Abstract: A field experiment was conducted to assess the effect of controlled release fertilizer on N₂O emission in paddy field under plastic film mulching cultivation (PM) with watersaving irrigation. Results showed that in the rice growing season, cumulative N₂O emissions from the plots applied with urea (PM+U) and with controlled release fertilizer (PM+CRF) were (38.2±4.4) and (21.5±5.2) mg N·m^-2, respectively. The N₂O emission factors were 0.25% and 0.14% in the treatments PM+U and PM+CRF, respectively. The controlled release fertilizer decreased the total N₂O emission by 43.6% compared with urea, of which 49.6% was reduced before the drying period. It also reduced the peak of N₂O emission by 52.6%. However, it did not affect soil microbial biomass N and soil NH₄⁺-N content at any rice growing stage, and grain yield either. No significant correlation was observed between N₂O flux and soil Eh or soil temperature at the depth of 5 cm.