The particle size distributions of waste glass powder ground for different times were measured by laser particle size analyzer, based on which the parameters of grinding dynamic equations were calculated with Origin software so as to determine the grinding dynamic characteristics of waste glass powder. The results show that the grinding efficiency of waste glass powder with large particle size decreases with increase of grinding time, and decreases near to zero after grinding for 120min. Both the equivalent particle size and specific surface area(SSA) of waste glass powder show a good linear relation to double logarithm of grinding time. The cumulative particle size distribution of waste glass powder is in accordance with the RRB (Rosin Rammler Bennet) distribution model. The particle size distribution of waste glass powder shows fractal features. The SSA of waste glass powder is in a good linear relation to fractal dimension of particle size distribution. The fractal dimension of powder size distribution of waste glass increases with grinding time, indicating that the waste glass powder is more difficult to grind.