The present invention provides distributing apparatus for a spent catalyst. The distributing apparatus is arranged in a regenerator and communicates with a spent catalyst inlet of the regenerator, andthe distributing apparatus comprises a distributing tank and a fluidization device; the distributing tank communicates with the spent catalyst inlet, and the side wall of the distributing tank is provided with groove holes for the spent catalyst to flow into the regenerator; and the fluidization device communicates with the bottom of the distributing tank, and the fluidization device is used tointroduce a fluidizing medium into the distributing tank to make the spent catalyst in the distributing tank flow. The distributing apparatus for the spent catalyst provided by the invention ensures circulation quantity of the catalyst, realizes fluidity of the catalyst during long-distance transportation, and solves the technical problem that current distributing apparatus does not facilitate maintaining large circulation quantity of a catalyst and the spent catalyst is not uniformly distributed in a regenerator because interruption of operation of a bed is easy to cause in the large-diameterregenerator.