The utility model discloses a combined type liquid-solid fluidization reactor which comprises a liquid inlet cone-shaped section, a reaction section and a settling cone-shaped section all sequentially arranged from bottom to top, wherein a bottom liquid inlet is formed in the bottom of the liquid inlet cone-shaped section, and/or two lateral liquid inlets are formed in the side part of the liquid inlet cone-shaped section symmetrically; the reaction section is formed by splicing two or more sub-reaction sections; the settling cone-shaped section comprises a baffle plate, an overflow plate, a solid feeding pipe, an exhaust port and a circulating liquid outlet; the baffle plate is arranged in the settling cone-shaped section; the overflow plate is arranged at the top of the settling cone-shaped section and seals the settling cone-shaped section; the exhaust port is formed in the overflow plate; the circulating liquid outlet is formed in the side surface at the upper part of the settling cone-shaped section; a feeding opening of the solid feeding pipe is formed in the top of the reactor, and the solid feeding pipe penetrates the settling cone-shaped section and extends into the reaction section. The combined type liquid-solid fluidization reactor has the advantages that the structure is simple, the control is easy, the function is reliable, the reaction efficiency is high, and the space and equipment investment are reduced.