Abstract: No nitrogen as control，five nitrogen rates were designed to investigate the effects of methods and rates of controlled release urea（CRU）application on the dry matter accumulation and yield of maize in a randomized design.The results showed that the dry matter accumulation and leaf area index were getting more increase with increasing of N application rate，compared with normal urea，CRU has obvious superiority.It could increase them before male tetrad stage，while decrease them after anthesis in the range of 0～150 kg/hm2.In the experiment，the targets went up along with the increasing of N application rate.The results also indicated the grain yield of maize was getting more increase with increasing of N application rate in the range of 0～150 kg/hm2，and it was increased by 5.0%～21.4%.Compared with the normal urea，the 75 kg/hm2 treatment of the grain yield was improved by 6.7%，3.4% under bottom application and side dressing between the rows of CRU and the 150 kg/hm2 treatment of the grain yield was improved by 8.8%，1.9%，respectively.In conclusion，using CRU can coordinate the growth of shoot to get higher grain yield，and increase of bottom application is benefit to improve the effects of CRU on grain yield.