According to the quality of local wheat, the technological process of 7 skins, 8 hearts, 2 residues and 2 tails, bran in the middle and back road, and 7 flour cleaning is adopted. The thickness of the front skin grinding is not divided, which is convenient for flow adjustment. Three skins and four skins are divided into thickness for easy operation. This process pays attention to the use of the powder cleaner, improves the purity of the core mill material, strengthens the classification of the front core mill, and ensures the high-quality powder extraction rate.