The invention discloses a culturing method for duckwheat. The method is characterized by comprising the following steps of selecting proper soil and finely finishing the soil, wherein the soil with rich organic matters, a thick soil layer, a well structure, sufficient nutrients, strong water and fertilizer holding capabilities and good draining is selected for planting, and the soil needs to be finely finished to obtain finely crushed soil blocks; during the soil finishing, applying 3000-4000kg of cow and sheep manure, 25-30kg of calcium superphosphate, 30-35kg of slowly released urea, 2-3kg of ferrous sulfate, 1-2kg of zinc sulfate, 1-2kg of sodium selenite, 6-9kg of potassium chloride, 30-35 kg of decomposed coal, 15-18kg of bamboo charcoal powder and 4-5kg of soil conditioner in per mu land. According to the culturing method for the duckwheat, the yield of the duckwheat can achieve more than 250kg per mu land, the soil quality is greatly improved, the quality of the duckwheat is also obviously improved, and beneficial components such as flavone and trace elements such as selenium and zinc of the duckwheat are improved by 15% compared with those of the traditional duckwheat.