The invention discloses a multifunctional tool for cleaning carbon electrodes, comprising a flange connecting plate, a first motor, a bearing sleeve, and a first main shaft, wherein the upper end of the flange connecting plate is mounted on a mechanical arm, the first motor is fixedly mounted on the lower end of the flange connecting plate, a bearing sleeve is provided below the first motor, the bearing sleeve is fixed together with the flange connecting plate through a tie rod, the upper end of the first main shaft passes through the bearing sleeve and is connected with the first motor, the lower end of the first main shaft is fixedly provided with a first spring, and the lower end of the first spring is connected with a main knife. The present invention saves labor cost, improves production efficiency, reduces the harm of dust to personnel, makes up for the vacancy of tools in the industry, and is installed on a mechanical arm, so that the carbon electrode can be automatically cleaned in all aspects.