The invention discloses a finned tube fluidized bed heater. The finned tube fluidized bed heater comprises a shell, a vertical tube bundle and a gas distributor. The vertical tube bundle is composed of a plurality of finned tubes. Each finned tube comprises a light tube and fins, wherein the fins are longitudinally welded to the surface of the light tube. The fins include different structures, andspecifically, a fin bending structure, a fin trepanning structure, a fin notching structure and a fin structure in the combined form of the three kinds of fins are included. According to the finned tube fluidized bed heater, heat transfer is enhanced, and the heat transfer efficiency is improved.