Four kinds of aggregates, including cherty limestone, limestone, basalt and diabase, had been used to measure Vickers hardness, Los Angeles abrasion value and polishing value. The attenuation model of polishing value of coarse aggregate based on Vickers hardness was established according to asymptotic exponential function. The experiment results show that Los Angeles abrasion value, final polishing value of coarse aggregate have good correlations with Vickers hardness. Attenuation rate of polishing value of coarse aggregate is affected both by coarse aggregate hardness and the hardness difference among its mineral composition. The final polishing value of coarse aggregate depends on the Vickers hardness.