The invention provides a carbon brush automatic processing machine. The carbon brush automatic processing machine comprises a worktable, wherein a rotary disk is installed on the worktable, carriers arranged in a ring array are installed along the outside edge of the rotary disk, carbon brushes are installed in the carriers, a vibration disk is further arranged on the outer side of the worktable,the vibration disk conveys the carbon brushes into the carriers through an automatic loading mechanism, a first positioning device, a plane polishing machine, a planeness detection mechanism, a secondpositioning device, an arc surface polishing machine, an accepted product unloading mechanism, a defective product unloading mechanism and a carrier cleaning mechanism are installed on a part, on theouter side of the rotary disk, of the worktable, and surround the rotary disk, and the automatic loading mechanism, the first positioning device, the plane polishing machine, the planeness detectionmechanism, the second positioning device, the arc surface polishing machine, the accepted product unloading mechanism, the defective product unloading mechanism and the carrier cleaning mechanism arerespectively arranged in correspondence with the carriers on the outside edge of the rotary disk. The carbon brush automatic processing machine can achieve full automatic surface processing of the carbon brushes, reduces labor cost, and achieves high processing efficiency.