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This invention discloses a method for artificially cultivating large-flowered sesame, comprising the following steps: S1, preparing the seedbed: After tilling the land, make raised beds and evenly spread well-rotted organic fertilizer on the bed surface; thoroughly water the bed surface, stir the surface soil into a thin mud, and scrape it smooth to create a slurry; S2, sowing: On the slurry bed surface, sow the seeds or tubers of the host plant, tiger nut, at a spacing of 10-15 cm, and evenly scatter the large-flowered sesame seeds on the muddy bed surface; S3, seedling management: Immediately after sowing, construct an arched shed, controlling the light transmittance at 40%-50%; ventilate in the morning and evening 20-30 days after emergence; remove the arched shed after 45-60 days and remove weeds; maintain the relative soil moisture content of the bed surface at 60%-80%. The advantages of this invention are: effectively increasing the yield of large-flowered sesame, achieving a double harvest of large-flowered sesame and tiger nut.