The present invention relates to the field of fluidized bed reactors, and discloses a fluidized bed reactor. The fluidized bed reactor comprises: a reactor main body (1) and a fluid distributor (2), wherein the reactor main body (1) comprises a reaction zone (4), wherein a plurality of fluid distribute holes (3) are formed in the bottom of the reaction zone (4), and the fluid distributor (2) comprises conveyor pipes that are connected with the fluid distribute holes (3), so that fluid materials can be conveyed to the reaction zone (4) by the conveyor pipes. The fluidized bed reactor disclosed by the present invention has the advantage that the fluid distributor is difficult to be corroded.