The utility model provides a wire-stripping tool which is used for a user to remove the external-layer insulator of an electrical wire. The wire-stripping tool comprises a first rod part and a second rod part, wherein the first rod part comprises a first conical blade and a first holding part; the second rod part is pivoted on the first rod part and comprises a second conical blade and a second holding part; the second conical blade can be overlapped with the first conical blade to commonly form a cutter blade; the user can apply the force to the first holding part and the second holding part; the wire-stripping tool has an opening state and a closed state; when in the opening state, the electrical wire can be arranged in the cutter blade; when in the closed state, the user applies the force to the first holding part and the second holding part; and the cutter blade can remove the external-layer insulator. In the utility model, the wire-stripping device has consistent thickness of the blade and can remove the external-layer insulator of the electrical wire smoothly.