Abstract: Yield potential of precocious corn Kenwo 2 and Demeiya 2 under different fertilization factors and different density was explored.Tests found that growth in big fat area was obviously better than small area，leaf area index was higher 7.6% in big fat area than small area under different fertilization.The yield with different treatments of two varieties：Kenwo 2 increased production 11.4% in big fat area than small area，Demeiya 2 increased production 12.5% in big fat area than small area，production increased 12.7% under different density.Effect of controlling residual injury of previous soybean was obvious using Bihu seed dressing and spraying leaf fertilizer.It had effect of increasing seedling resistance according to spraying leaf fertilizer of Futian Jiali and Caitemei.