This circulating fluidized bed boiler burns biomass fuels such as corn stalks, wheat, bark, nutshells, and other agricultural and forestry waste. The product features a simple and compact structure, similar to traditional pulverized coal-fired boiler designs. The boiler body includes combustion equipment, coal feeding devices, a bed ignition system, separation and return systems, a water cooling system, a superheater, an economizer, an air preheater, steel structures, platforms, stairs, and furnace walls.