The invention relates to a brush holder, a juicing cup and a food processor. The juicing cup comprises a filter screen and a cup shell. The brush holder comprises a brush holder body and brush plates,wherein the brush holder body is rotatably mounted between the cup shell and the filter screen; the brush plates are mounted on the side wall of the brush holder body, the first ends of the brush plates extend out of the bottom of the brush holder body, and the brush plates are used for sweeping the cup shell and/or the filter screen when the brush holder body rotates. The brush holder provided by the technical scheme of the invention comprises the brush holder body and the brush plates, and the brush holder body is mounted between the cup shell and the filter screen, and can rotate between the cup shell and the filter screen; the brush plates are mounted on the side wall of the brush holder body, and are used for sweeping the filter screen and the cup shell when the brush holder body rotates, wherein the first ends of the brush plates, namely, the lower ends of the brush plates extend out of the bottom of the brush holder body, namely, the brush plates are exposed from the lower endof the brush holder body, so that when the brush holder is mounted in a cup shell of the food processor, the brush plates can extend to the bottom of the cup shell, and thus the bottom of the cup shell can be swept.