The invention relates to a precise remedy method for two sections of grind, belonging to the ore crash, the mill technical field in the method of preparation. The newly feeding ore with the largest size 25-15 mm is ground to the size smaller than 0.15 mm for two sections, wherein the size smaller than 0.074 mm reaches 70 wt% or thinner product fineness. According to the requirement, the precise makeup remedy method in two sections of grinding suggested in the invention mills the newly feeding mineral grain to the largest size 2-3 mm, wherein the size smaller than 0.074 mm is 20-30wt%, in the second grinding, the size is then ground to smaller than 0.15 mm, wherein the size smaller than 0.074 reaches beyond 70%, to replace the experience remedy method with rude and bad effect in the existing production. The invention not only used in the two section grinding circuit, but also is fit for the three-section grinding circuit, which has good product size characteristic, high sizing index, and can be applied in the grinding technology of the different ore rigidity, different mill specification, different rotating speed mill and different character of ore.