Abstract: A field experiment was conducted, and 6 treatments (T₁~T₆) were set up to harvest rapeseed shoots at different heights (15, 20, 25 and 30 cm) when the shoots reached varying growth stages (20, 30 and 40 cm in height). The study investigated the effects of these harvesting methods on growth, yield and quality of flue-cured tobacco. The results showed that planting vegetable and fertilizer dual-purpose rapeseed in winter-fallow tobacco fields significantly promoted the early and mid-growth stages of subsequent flue-cured tobacco, improved the output value, appearance quality and sensory quality of cured tobacco leaves, and made the chemical composition more harmonious. Notably, the T₅ treatment of harvesting 25 cm of shoots when they reached 40 cm in height performed particularly well. For large-scale planting of dual-purpose rapeseed in winter-fallow tobacco fields, a batch harvesting mode of collecting shoots at 20~30 cm when they reach 30~40 cm in height is recommended. This approach not only reduces harvesting and sales pressure but also benefits subsequent flue-cured tobacco production.