Triboelectrostatic Beneficiation is a suitable dry process technique recognized widely to remove unburned carbon from fly ash. One of the most significant problems related to fly ash triboelectrostatic beneficiation is the cross-sectional shape of the friction rods. It has an important effect on tribocharging process. The purpose of this research was to determine which kind of cross-sectional shape of the friction rods was appropriate to improve the efficiency of fly ash tribocharging and to remove unburned carbon. An experimental program was conducted to study the effect of four kinds of friction rods with different cross-sectional shapes on tribocharging of fly ash particles. Fly ash particles with sizes ranging from 38 to 74 mm and averaged LOI of 12.65% were used for the study. The operating conditions were electric field voltage of 40 KV and air flux ranging from 12 to 24 m 3 =h. The results of the study showed that tribocharging efficiency of circular shape friction rods was higher than that of others shapes of rods The removal unburned carbon efficiency of friction rods with circular shape was the best among the four kinds of friction rods evaluated, based on the LOI and unburned carbon rate removal.