A novel biomass pulverization technology was presented, and its performance is affected by many aspects, which have not been studied and optimized. This paper mainly concerns with a detailed study of the effect of rotor speed. The pulverization tests were conducted in a lab-scale crushing system and the results show: higher rotor speed improves the hit probability between blades and materials, enhancing the impacting and grinding effects. Thus higher rotor speed generates much finer particles. Meanwhile the energy consumption shows increasing trend with increasing rotor speed.