The invention discloses a fluidization heat accumulation type sludge low-temperature catalytic pyrolysis method. The method comprises the following steps: A, sludge is pyrolyzed to produce gas; B, pyrolysis gas is recycled; and C, the residual heat produced by waste gas combustion is utilized. The invention also discloses a fluidization heat accumulation type sludge low-temperature catalytic pyrolysis device. On one hand, the pyrolysis gas produced by the pyrolyzed sludge is enabled to pass through an air preheater, so that the heat is recycled, and then the pyrolysis gas is condensed by a condenser to obtain tar, and the pollution to the environment due to gas emission is avoided; on the other hand, the pyrolysis waste is directly discharged and collected, the structure is simple, the operation is convenient and the potential safety hazard is also reduced. According to the invention, the fluidization, the pyrolysis of heat accumulation particles and the residual heat produced by pyrolysis gas and waste gas combustion are comprehensively utilized, and tar is also prepared, so that the efficient utilization of energy and resource of sludge and the environmental protection are realized.