The application provides a pay-off system for an automatic packer of high-speed wire rods. The pay-off system comprises a packing silk yarn warehouse, a pneumatic wire brake mechanism, a fixed pulleyset, a guiding upright, a wire weight device and a ground bumper, wherein the wire weight device is sequentially provided with a movable pulley set, a guiding mechanism and a balance weight; the fixedpulley set is arranged at the upper end of the guiding upright; the ground bumper is arranged at the lower end of the guiding upright; and the wire weight device is connected with the guiding uprightthrough the guiding mechanism in a sliding manner. Through cooperation between the fixed pulley set and the movable pulley set, the lifting height of a wire weight is reduced; as the balance weight is added, a labor-saving function of the movable pulley set is canceled, and accordingly, a tensile force of a packing silk which bypasses the pulley sets is equal to the original value; meanwhile, thegravity center of the wire weight can be adjusted, so that the wire weight can be kept horizontal in a lifting process, and accordingly, a jamming elimination role can be played; and the ground bumper is modified to prolong the impact time, so that synthetic actions of reducing damages to the wire weight and the ground bumper, saving the working space and eliminating potential safety hazards areachieved.