Abstract: In order to explore the suitable sowing dates and maize varieties, in the early matured district of Shanxi Province in 2015, the earliest matured and early matured and middle matured maize varieties were used as materials. The growth stage and yield and yield components were detected at different sowing stages. The results showed that, at the four stages, the earliest matured and early matured maize varieties could mature normally, but middle matured maize varieties could not mature which were sowed after April 21. With the sowing date moving up, the yield of the different growth stage varieties were all increased significantly. Yields of early matured and middle matured maize varieties were significantly greater than the earliest matured maize varieties, but there was not significant difference between early matured and middle matured maize varieties. The main reason of yield difference was the difference of the kernel weight of different maize varieties. In the relationship of yield and related environment factors, the accumulated temperature of growth stage has the significant positive correlation with yield, and yield was increased with the accumulated temperature increase. In conclusion, this area was suitable for planting early maturity varieties, the suitable sowing date was on April 20, and the yield could reached the highest.