Abstract: An experiment of type of nitrogen fertilizer and rate was carried out to investigate their effects on on dry matter accumulation, grain yield, the N efficiency and economic benefit of the summer maize (Zea Mays L.). in a randomized design. With no nitrogen used as control, 150 and 215 kg N?hm-2 were both applied by one times. The results showed that, at the same nitrogen level, coated 【OBJECTIVE】The objective of the study is to investigate the effects of normal urea (NU) and coated compound fertilizer (CCF) on the N efficiency and yield of summer maize under different application rates conditions;【METHOD】Five nitrogen rates were designed to investigate the effects on dry matter accumulation, kernel filling rate, the N efficiency and grain yield in a randomized design, and the relationship with grain yield and the N efficiency;【RESULTS】The results showed that, at the same nitrogen level, CCF can significantly increase dry matter accumulation and kernel filling rate with NU. The average grain yield of maize applied with CCF was 6.9 % higher (P< 0.05) than that applied with NU. In addition, the average agronomic efficiency of nitrogen (AE) and the partial factor productivity for applied N (PFP) treated with CCF were 6.6% and 9.8% higher than those treated with NU, respectively. The higher level application of CCF could significantly increase grain yield, AE and PFP of maize;【CONCLUSION】Compared with the NU, the positive effect on the N efficiency and grain yield of CCF might be caused by the higher dry matter accumulation and kernel filling rate. With the increase of CCF production, its cost will be decreased and its use prospect will be wider in crop production.