A wire-stripping pliers is disclosed to include a cutter holder fixedly provided at the upper clamping jaw of the pliers body thereof, a curter blade fixedly mounted on the cutter holder, a support rod fixedly provided at the lower clamping jaw of the pliers body and movable with the lower clamping jaw relative to the cutter blade, and a sleeve rotatably mounted on the support rod for supporting an electric wire for cutting by the cutter blade.