The invention provides a tail roll clamp which comprises a moving mechanism and a clamp mechanism, wherein the clamp mechanism is fixed on the moving mechanism, the moving mechanism can move along a track in the axis direction of a coiling machine so as to drive the clamp mechanism to move to a position wherein a tail roll center line on a coiling drum is located; a driving part of the clamp mechanism is fixed at one side of a clamp center line, the left clamp palm and the right clamp palm of the clamp mechanism are arranged in an offset way relative to the clamp center line, and the sizes of the left clamp palm and the right clamp palm are different, so as to prevent the clamp mechanism from contacting a press roll of the coiling machine in an opening state and a clamping state and prevent the clamp mechanism from contacting coiling machine external support equipment while moving along the axis direction of the coiling drum in the open state. By adopting reasonable structure design, the tail roll clamp effectively solves the technical difficulties that after the press roll of the coiling machine is opened, high-strength steel tail roll is loosened and further normal roll unloading cannot be achieved, production and operation efficiency is improved, and the labor intensity of operators is reduced.