To find out the rational nitrogen application rates for new high-yield maize variety Songyu 419 in semi-humid areas of Jilin province, field experiment was carried out. Five nitrogen application rates were designed, whichwere 0, 100, 160, 220 and 280 kilograms per hectare. Under the different nitrogen application rates, the physiologi-cal characteristics, yield, yield traits and quality characteristics of Songyu 419 were studied. The results showed thatwith the increase of nitrogen fertilizer, the relative chlorophyll content and leaf area index increased, the protein andoil content increased and starch content decreased, the yield increased at first and then decreased. It suggested thatthe optimal nitrogen application rate was 220-240 kg/ha for the coordination of yield and quality.