The present invention relates to a plowshare for a ridge plow that plows up soil of arable land such as a rice field based on traction by an agricultural machine and is disposed in the back of the agricultural machine such as a tractor and a control machine and, more particularly, to a plowshare for a ridge plow in which wear-resistant special steel is welded to an excavation blade of an excavation unit where the plowshare is formed so that a bead portion is formed and the plowshare can have an extended service life based on enhanced wear resistance and durability. Multiple connecting poles and link connecting poles are assembled to constitute the ridge plow. The link connecting pole is coupled with one side of the connecting pole to be capable of pivoting by a lower link connecting pole and an upper link connecting pole being formed and a hinge being formed in the middle between the lower link connecting pole and the upper link connecting pole. The lower link connecting pole is connected and fixed to a hinge portion of the agricultural machine. One end of an elastic connecting member and a rod of a cylinder of the agricultural machine are fixed to the upper link connecting pole. The other end of the elastic connecting member is fixed to a central portion of the connecting pole. A plowshare pole is mounted on a lower side of the connecting pole and a comb and the plowshare are fixed and fastened at a lower end of the plowshare pole. The plowshare further includes: a coupling portion having a plurality of coupling holes and fixed to and coupled with the comb the excavation unit formed to extend from the coupling portion and provided with the excavation blade and the bead portion having the wear-resistant special steel formed to surround the excavation blade of the excavation unit. The bead portion is formed of a magnesium alloy of the wear-resistant special steel, is formed to surround the entire the excavation blade, and is formed to extend by 1 to 5 mm on front and
