The particle attrition could degrade product quality in crystallizer, and cause environmental problems. We use attrition kinetics model to research the effect of attrition time, circulation flow rate and particle attrition propensity by researching the crystal attrition characteristic of sodium chloride in fluidized bed crystallizer (FBC). The results show that surface attrition causes particle attrition in FBC and the attrition process of particles is closely related to the physical properties of particles and fluidization conditions. At present, the widely used Gwyn model cannot accurately describe the relationship between particulate property and attrition, proposes a novel particle attrition kinetics model, which describes the crystal attrition process by material properties of particles. The model parameters have definite meanings and are highly correlated with the material mechanical properties of particle, the predictions of this new model are in better agreement with the Gwyn's model.