The utility model discloses a self-cleaning type bucket elevator base. The device comprises a rack, wherein the lifting device is installed inside the machine frame and used for lifting the bucket body, and the tensioning device is used for tensioning the lifting device. A machine base inner container capable of ascending and descending relative to the lifting device is installed on the lower portion of the machine frame, the machine base inner container is in an arc shape matched with the lifting device, and a lifting device driving the machine base inner container to ascend and descend is further arranged on the machine frame. According to the bucket elevator, accumulated materials in the base inner container can be cleaned in time, the phenomenon that particles are clamped in a gap between the bucket body and the bottom of the machine base inner container cannot occur at the tail in the working process of the bucket elevator, and the working efficiency is improved.