Abstract: In order to improve the coal water slurry ability of Shenfu coal,in combination with dry powder produced process,the paper used the Alfred model to calc ulate the particle size distribution of Shenfu coal powder. The results showed that the actual content of the coal particle size less than 10 μm was lower,so fine coal pow der gradation optimization was used,in order to make the real particle size distribution was closer to the Alfred model distribution. Meanwhile,coal water slurry ability of Shenfu coal power was improved,the concentration of coal water slurry was increased to more than 63%, static stability could reach to more than two weeks.