Rotary cultivator blades are the most wearable and damaged parts, and its technical state has a great influence on the quality of the work. According to regulations, the blade material is 65Mn or 60Si2Mn, the hardness of the cutting edge part is HRC50-55; the shank part is annealed, its hardness value is HRC38-45; the blade edge thickness is less than or equal to 0.5mm. When the edge is dull and the thickness is more than 0.5mm, the blade should be removed to sharpen the edge on the grinding wheel. If necessary, the blade should be forged and then sharpened. After the edge is sharpened, the blade should be quenched and the blade heated to 800-850. °C, quenched in oil or water, quenched and tempered at 200 °C.