The invention provides a precipitation assembly for producing a catalyst. The precipitation assembly comprises a precipitation cavity, wherein a cover body is arranged at the upper end of the precipitation cavity; the cover body is further provided with a pipeline mounting hole for mounting a liquid pumping pipeline; an unloading channel is formed in the lower end part of the precipitation cavity; the unloading channel and the precipitation cavity are coaxially arranged; an unloading plug cock for controlling materials to be unloaded or not is mounted in the unloading channel; a supporting column is further arranged on the lower end face of the precipitation cavity; and the lower end of the supporting column is fixedly connected with a material collection platform. The precipitation assembly for producing the catalyst, provided by the invention, has the beneficial effects that solid-liquid separation is carried out in the precipitation cavity; liquid, which is finally separated, is pumped out from precipitation cavity through a pipeline mounted in a pipeline mounting hole and residual catalyst sediment falls onto the material collection platform through the unloading channel, so that the labor intensity of workers is greatly alleviated, the working time is saved and the production efficiency is improved.