Abstract: 【Objective】 To study the effects of different shade treatments on the photosynthetic performance and material content of Taraxacum kok-saghyz Rodin and explore the physiological mechanism of shade affecting the grass. 【Method】 The field experiment was carried out in the Anningqu Comprehensive Test Field of Xinjiang Academy of Agricultural Sciences in 2019. 3 treatments (no shading, mild shading and severe shading) were set. 【Result】 Compared with normal light photography, mild shading and weak light affected the distribution of light energy in chloroplast of TKS brasiliensis, promoted the production of light contractual products, increased the photosynthetic performance and material content of TKS brasiliensis, and finally affected the physiological characteristics. The SPAD, (P_n), (T_r) and (G_s) of TKS brasiliensis decreased rapidly, the intercellular CO₂ concentration (C_i) increased, and the contents of total phenol, total flavonoids, organic acid, chlorogenic acid and caffeic acid decreased in leaves and roots of TKS brasiliensis. Zhaosu 1-1 related index change range was smaller than the one (Hayin 2-6) introduced from Kazakhstan. 【Conclusion】 The growth adaptability of different strains of Taraxacum kok-saghyz Rodin under different shading environment is different. Especially in severe shading environment, the photosynthetic performance of two kinds of Taraxacum kok-saghyz Rodin decrease significantly, the accumulation and output ability of photosynthetic products are blocked, and finally the physiological characteristics of the grass are affected.