External thread cleaning tool

The invention discloses an external thread cleaning tool. The cleaning tool comprises a cutter frame capable of being arranged outside a part where external threads are located in a sleeving mode, wherein a plurality of cutter holes are distributed in the circumferential direction of the cutter frame, and cutter bodies which can extend into the cutter frame to correspond to external thread structures on the part are arranged in the cutter holes in a penetrating mode correspondingly. According to the external thread cleaning tool, one cutter frame with the inner diameter larger than the diameter of the part where the external threads are located is arranged, the plurality of cutter bodies which can extend into the cutter frame and abut against the external thread structures are arranged onthe cutter frame in the penetrating mode, and then the cutter bodies can dig and scrape an attachment layer attached to the external threads along the thread track of the external thread structures through circumferential rot