Abstract: Light quality not only affects the photosynthetic rate of plants, but also influences the accumulation and transport of photosynthesis products, the synthesis of secondary metabolites, and the response of plants to adversity stress. In this paper, we reviewed regulation mechanism of light quality on the photosynthetic efficiency and secondary metabolite synthesis in horticultural crops, in order to provide theoretical basis for the cultivation of new varieties of horticultural crops and optimization of cultivation measures.