The invention relates to a cutting tool for high-efficiently removing crossed aperture burrs of automobile spare parts. The cutting tool comprises a cutter handle and a cutter bar, wherein the cutterbar is arranged on the lower part of the cutter handle through a drive connecting piece; the cutter bar is a cylindrical long bar and is provided with a strip opening slot; an elastic piece is arranged in the opening slot; circular holes are formed in two sides, perpendicular to the opening slot, of the bottom end of the cutter bar; a shaft pin penetrates through the circular holes and the open slot; and a swinging blade is arranged on the shaft pin and up-and-down or inside-outside move under the actions of the shaft pin and the elastic piece. Compared with the prior art, the invention provides the cutting tool for high-efficiently removing the crossed aperture burrs of the automobile spare parts. The swinging blade can stretch out and draw back up and down as well as inside and outside according to shapes of crossed holes, chamfers can be processed on sides of the irregular crossed holes, and the processed product chamfers basically stay the same, so that the batch numerical controlmachining is realized; and compared with manual deburring in the prior art, the burrs can be removed cleanly and uniformly, the product quality is high, and the working efficiency is improved.