Based on per-winter positive accumulated temperature in three regions of Huang-Huai Winter Wheat Area and Baoding of northern winter wheat area during 1997-2006, the suitable planting dates of winter wheat were preliminarily studied. The results showed that the suitable planting dates of different regions were as follows: Handan was between October 8 and October 18; Shijiazhuang was between October 5 and October 15; Hengshui was between October 2 and October 12; Baoding was between October 1 and October 11. As a result, it is considered that the suitable painting dates of winter wheat are between October 5 and October 12 in the north area of Huang-Huai winter wheat area，and between October 1 and October 11 in the south area of northern winter wheat area.