Abstract: A new type of cyclonic divider has been developed to adjust and control powder dividing adapted to high temperature operation environment. On the basis of the experimental studies of the unit cyclonic divider,the effects of dividers structural parameters on the dividing ratio were obtained. In the on -line experiments, the structure of the divider was modified to fit the special conditions of the Circulating Fluidized Bed (CFB). The performance of the divider was also investigated in the on - line cold model, which could provide the reliable basis for hot model experiments and practical uses.