The invention relates to the field of production and machining of agricultural implements, in particular to a manufacturing method of a high-strength, high-toughness and abrasion-resistant disc harrow. A high-strength steel plate serves as a raw material, and quenching and pressing of the harrow are finished at the same time through the stamping forming and quenching integrated process. After a machined disc harrow blank is heated to austenitizing temperature and subjected to heat preservation for a certain time, the blank is quickly transferred into a forming die, subjected to stamping forming and quickly cooled to temperature below Martensite start transformation temperature (Ms) of the material in the die, and forming and quenching are finished at the same time. The disc harrow produced through the manufacturing method is simplified in production process, free of quenching pollution and low in cost. The tensile strength is more than 1,600 MPa, the hardness is 48-52 HRC, the impact toughness (ak) is more than 20 J/cm<2>, and the performance is far superior to that of 65 Mn harrows massively used domestically at present. The harrow is high in dimensional precision and small in circle run-out.