Abstract: The seedlings of ’Sweet Gram’, ’Pink Lady’, ’Luminous Orchid’ and ’Green Bear’ were used as the test materials, and incandescent light used as the control, 100% red light, 70% red light + 30% blue light, 50% red light+50% blue light, 30% red light+70% blue light, and 100% blue light were set. The effects of different light quality ratios on the growth of Phalaenopsis ssp. seedlings were investigated. The results showed that the growth indexes such as height, number of leaves, leaf tip distance, leaf width, leaf length and longest root length of Phalaenopsis ssp. seedlings were the highest under 50% red light + 50% blue light treatment, which were the most favorable to the growth of Phalaenopsis ssp. seedlings; Meanwhile, the proliferation rate of plants under different light quality ratios from big to small were ’Green Bear’, ’Sweet Gog’, ’Sweet Gog’, ’Sweet Gog’, ’Luminous Orchid’, ’Pink Beauty’.