| IIn order to definite the canopy characteristics and to create high yield cultivation conditions for new high-yield variety Maize Jidan 96 in semi-humid areas of Jilin province, field experiments were carried out. Five nitrogen application rates were designed, which were 0, 150, 225, 300 and 375 kilograms per hectare. Five planting density gradients were designed, which were 60000, 70000, 80000, 90000 and 100000 plants per hectare. The physiological and structure indexes of the canopy, yield characters and yield indexes were studied under different nitrogen application rates and planting density gradients. The results showed that the chlorophyll content was sensitive to the nitrogen and planting density during the flare opening period and the tasseling stage individually. It was necessary to topdressing before the flare opening period. Total nitrogen was controlled at 225-300kg/hm2 and 60% of the amount was used as the topdressing fertilizer. LAI was sensitive to planting density. The optimum density is 77000-80000 plants per hectare, which can maintain the highest LAI at about 5.5. On intermediate-high fertility condition, planting density of 77000-80000 plants per hectare and total nitrogen of 225-300kg/hm2 can maintain canopy structure and function. Coordinated with kernel number per ear and 100-kernel weight increasing synchronously, Jidan 96 can achieve a yield of 12 780.9 kg/hm2.