In order to investigate the influence of physical properties of bentonite on the drop numbers of green pellets during the pelletization, the experiments of using 9 different bentonites were carried out under the conditions of adding 2.1% bentonite, balling for 15min with the moisture of 8%. A MATLAB multiple linear regression equation was used to analyze the experimental data. The results show that the viscosity and water absorption of bentonite play the significant role in the drop numbers of green pellets, and the relationship between drop numbers and the normalized coefficients of viscosity and water absorption is:Y₁=1.67508+0.850566x₃+2.20427x₅.