Yanyu 1 is an extremely early maturing elite hybrid developed by the cross of S06-16-1 and T07-16-2 with 114 days from seedling to mature in 2011, and authorized by Crop Variety Expression and Approve Committee of Jilin Province in 2016 with authorization number Jishenyu2016002. The content of crude starch, crude protein,fat and lysine in Yanyu 1 were 74.29%, 8.77%, 3.43% and 0.29%, respectively. During regional trails in Jilin Province from 2014 to 2015, the hybrid Yanyu 1 gained 11 198.1 kg/ha on average cross over the 8 trail sites with 11.3%on average higher than the control, and the maximum yield reached 12 669.4 kg/ha. The hybrid Yanyu 1 is suitable to cultivate in the early maturity area, and characterized by highly resistance to corn borer, resistance to corn northern leaf blight, head smut and stem rot, mid-resistance to Curvularia leaf spot. It has the characteristics of seedling arched soil ability, early emergence, high bulk density, good grain quality, strong stress resistance and kernel mature under green leaves