Since the major expence of production in cement industry is the electric power cost, many scientists had researched in various ways for saving the electric power. This is an urgent problem because the electric power cost is getting more and more expensive these days. Cement clinker was taken as a sample of industrial materials. As one means of saving power, it was attempted to prevent the growth of secondary particles on liquid contacting system by using organic crushing aids such as secondary alcohol series, fats and resines. In this study the increase of crushing effect was investigated in gaseous contacting system with organic crushing aids, whose boiling points are below 100 ℃. Organic crushing aids that were used here are ethyl alcohol, methyl alcohol, acetone, benzene, diethyl-ether, and acetaldehyde in the concentration range from 0.05 to 0.5 % by weight. A continuous model in dry crushing was adopted with practical operating conditions for comparison. Computation of power saving was carried out with respect to the tendency of specific surface diameter of particles.