The invention discloses a robot automatic tail cutting system. The system comprises a wire rod tail ring recognition mechanism and a tail ring removing robot; the wire rod tail ring recognition mechanism is used for recognizing a wire rod tail ring on a produced high speed wire rod; and the tail ring removing robot is used for removing the wire rod tail ring recognized by the wire rod tail ring recognition mechanism from the produced high speed wire rod. Compared with the prior art, the provided robot automatic tail cutting system can replace manual work, and is responsible for the cutting work of the tail of the high speed wire rod, so that the man-made influence is eliminated, the industrial accident rate of a factory is reduced, and the operation efficiency is improved.