The invention discloses a special welding rod used for the hardfacing reparation of a high carbon steel type high-speed railway base tamping pick. The coating of the special welding rod comprises the following chemical ingredients 1-3wt% of titanium dioxide, 25-35wt% of marble, 9-15wt% of fluorite, 2-4wt% of quartz, 2-4wt% of chalk, 5-7wt% of high-carbon ferrochrome, 2-4wt% of high-carbon ferromanganese, 3-5wt% of graphite, 1-3wt% of ferrosilicon, 6-8wt% of ferrotitanium, 5-7wt% of ferromolybdenum, 5-7wt% of cerium oxide, 3-5wt% of metallic nickel, 1-3wt% of ferrovanadium, 3-5wt% of tungsten carbide and 5-7wt% of ferrotungsten, and a core wire is an H08A steel core wire. Through adoption of the welding rod disclosed by the invention, the step of preheating before the welding can be avoided, and low-temperature tempering after welding is used for carrying out surfacing reparation or reproduction for the high-speed railway base tamping pick; because the surfacing metal is high-carbon steel, the surfacing surface has higher abrasion resistance and certain impact resistance and cracking resistance and the special welding rod is very convenient to use on site; the surface hardness range of the high-speed railway base tamping pick after surfacing is HRC (Rockwellhardness) 61-65; and the service life of the repaired high-speed railway base tamping pick is 2-3 times that of the integrally-manufactured tamping pick.