Abstract: In order to solve the problem of breeding method single and quality degradation of Lily’s mother seed. With Lilium davidii var. unicolor Cotton as the experimental material, studied on the effects of disinfected treatments on the rot rates of scale, and the effects of different thickness and position of scale on aerial cultivate bulbs. Results show, with 0.1% potassium permanganate soak scale about 10 min, the rot rates was the lowest, which was 21.25% and was lower than CK after 15 days; with the best disinfected treatment treat lily scale, after 60 days, the reproduction coefficient of treatment, the thickness of outer flap was 4.0 cm, was 2.41 and was the highest in all, but outer flap was easy perishable than inter flap. Aerial cultivate bulbs on lily, outer flap was more suitable than inter flap, propagation coefficient was inversely proportional to the thickness of aerial.