Dendrobium officinale Kimura et migo, a rare and endangered medicinal material, is a perennial herb belonging to Dendrobium Orchidaceae, which is distributed in the provinces south of Qinling Mountains and Huaihe River in China and grows on cliffs, rock crevices or ancient trees in Shan Ye. The ancient aristocrats called Dendrobium candidum "Ziying Xian Di" and "Millennium Run", and the historical folks also called it "life-saving fairy grass", "revival grass" and "inch golden grass". Authentic Dendrobium candidum is iron green, slightly gassy, sticky when chewed, sweet in taste, less in residue, and has no side effects after long-term consumption (a pure natural green agricultural product with dual functions of medicine and food). Stir-fry Dendrobium officinale, twist it into a spiral shape and dry it, and then call it Dendrobium officinale. Its health care and treatment effect is exact, and it is recorded in medical classics such as Daojing, Shennong Materia Medica, Compendium of Materia Medica, Dictionary of Traditional Chinese Medicine and China People's Pharmacopoeia (20 10 edition). Dendrobium candidum is an endangered, rare and high value-added resource medicinal material, which has been listed in the List of Species of Wild Medicinal Materials under State Protection (1987), China Plant Red Book (1992) and CITES Appendix II. On 20 10, the production technology and industrialization of Dendrobium candidum were once again included in the national key new product plan and the national torch plan. Hunan is the origin of Dendrobium candidum, and Langshan Mountain in Xinning County is still scattered. Tissue culture, rapid propagation and large-scale planting of Dendrobium candidum seedlings have been included in the development plan of strategic emerging industries in Hunan Province.