Abstract: Yannuo 7 was a white waxy—grained maize hybrid selected from the crossing of two inbred lines by Yantai Academy of Agricultural Science in 1995,with female parent 43221 and male parent 1211. It had showed many improved characteristics like early maturity and high yielding, disease and lodging resistance, high protein content, good taste, thin grain peel and high rate of commodity ears etc. , thus it bears good practical values in field production. Yannuo 7 had been authorized by Crop Authorization Committee of Shandong Province in 2003.