The utility model provides a circulating fluidized bed type roasting furnace, which comprises a roasting furnace body and a heat and wind supplying system which is communicated with the roasting furnace body. The roasting furnace body comprises a feed port, a wind chamber, a boiling bed, a furnace tank, an overflow port and a material aggregating and return-flow system arranged outside the roasting furnace body. The material aggregating and return-flow system comprises a return flow and aggregating device, a return flow device and a return flow pipe, wherein the return flow and aggregating device is used for separating gas from air flow and collecting materials which are carried outside the furnace tank by air flow, the return flow device transfers collected materials which are carried outside to the boiling bed, the return flow and aggregating device is communicated with the furnace tank, the return flow device is arranged below the return flow and aggregating device, one end of the return flow pipe is connected with the return flow device, the other end extends into the boiling bed, and the end which extends into the boiling bed inclines downward. Because installed with a material aggregating and return-flow system outside the furnace tank, the utility model can employ an air flow speed much larger than that of ordinary boiling bed, particle carried outside the furnace tank can return to the boiling bed in cycle, thereby ensuring stability of the boiling bed.