Abstract: Abstract: The field experiment was conducted to study the Effect of nitrogen optimized management method on Grain Quality of Winter Wheat. The main results were as follows: There was no significant differences in the winter wheat grain yield between optimized N supply rate (90+30) and other N supply treatments (Soil Nmin + N Fertilizer). Gross protein and gluten contents of winter wheat grain of optimized N supply rate (90+30) was significantly higher than that of highest N supply rates (150+90), but there was no significant differences compared with other nitrogen supply rates. Nitrogen optimized management method with the aim of high yield, high efficiency of nutrient resource and friendly environment effect got excellent grain quality of winter wheat.