In order to determine the effects of nitrogen (N) fertilizer type and plant density on rice yield and N use efficiency in Liaohe delta, an experiment was established on a typical rice field.Zero-N+low plant density and zero-N+high plant density were used as control treatments in this study, and common urea+low plant density, common urea+high plant density, loss-controlled urea+low plant density, and loss-controlled urea+high plant density were also included in which the same N fertilizer amount were applied.Crop growth, yield formation, and plant N uptake were measured to analyze the differences among treatments.Grain yield and N use efficiency were significantly affected by N fertilizer type, while were not affected by plant density and N fertilizer type by plant density interactions.Compared to common urea, loss-controlled urea increased grain yield (6.6%~13.8%) and N use efficiency (5.4%~10.1%) regardless of high or low plant density.However, high plant density did not enhance grain yield and N use efficiency compared to low plant density.Number of stems was strongly increased with increasing plant density, which enhanced dry matter accumulation, N uptake and panicle formation in the early growth stage，but high plant density reduced N uptake in the later growth stage, which led to a significant decrease of spikelets by 10.3%.Loss-controlled urea could increase productive tillers in low and high plant density treatments, while spikelets were only increased in low plant density treatment.Furthermore, the application of loss-controlled urea could reduce the N surplus of 15.7~28.2 kg/hm² by enhancing shoot N uptake.Hence, the application of loss-controlled urea combined with low plant density can increase rice yield and N utilization in Liaohe delta, which is an effective cultivation management for high and stable rice yield in this area.