Using ‘Zhengdan 958’ as material, the canopy structure and photosynthetic characteristics of spring maize at late-growth stage under different fertilization patterns were studied in the paper. The results showed that in different fertilization pattern spring maize ear, stem diameter, the second internodes length and chlorophyll content of each leaf were higher in high fertilization mode than reduced fertilizer pattern. In reduced fertilizer pattern leaf angle of ear leaves and above leaves was bigger than that of high fertilization mode, while leaf angle of under ear leaves is opposite. Leaf orientation value of the above ear leaves and three ear leaves of high fertilization mode was greater than that of reduced fertilization mode, while leaf orientation value under three ear leaves is opposite. Corn net photosynthetic rate of high fertilization mode in silking stage and milk stage was higher than reduced fertilization pattern.