Abstract: In order to provide a theoretical for high yield and quality of wheat, using‘Yaomai 16’,‘Anmai 16’ and‘Taishan 4241’as materials, the application of pure N 270 kg/hm2 and 3:7, 5:5, 7:3 effects of nitrogen topdressing on the bottom, study different varieties of wheat growth and yield. The results showed that, ‘Yaomai16’ and‘Anmai16’yieldwasthehighestin3:7treatment,yieldwere6839.93kg/hm2 and6202.2kg/hm2,the highest yield of‘Taishan 4241’under the treatment of 5:5, up to 7629.23 kg/hm2. The yield of‘Taishan 4241’was the highest,‘Anmai 16’was the lowest. Under different nitrogen topdressing ratio, SPAD values of ‘Taishan 4241’'s flag leaf were the highest, and topdressing ratio under 3:7 treatment showed the highest, ‘Yaomai 16’and‘Anmai 16’in 5:5 treatment showed the highest. The filling time relative to the filling rate is more easily influenced by nitrogen fertilizer topdressing ratio,‘Yaomai 16’and‘Taishan 4241’'s grouting process of impact was greater than the‘Anmai 16’,‘Taishan 4241’grain filling duration and grain filling rate were higher, functional leaf decay slower , production capacity is strong, can provide more nutrients as the kernel development, so as to provide the material guarantee for higher yield.