The yield of sunflower grown on salinized soil was significantly increased by nitrogen fertilizer application. The lower the content of soluble N, the more yield increase was gained, The yield was increased by 28.8 percent to 51.8 percent. The proper nitrogen application amount was 85 to 102 kg per hectare. The yield was more significantly increased by nitrogen fertilizer application combining with phosphate and potash fertilizer. The best effect was gained when 1/3 of total nitrogen fertilizer was applied while sowing and the others applied at the flower bud appearing period.