Kang County is a green treasure land in Gansu. The forest coverage rate in the territory is as high as 84%. It is rare in China. In the dense forest, there are more than 700 species of higher plants in 172 families, among which the tree species suitable for the growth of edible fungi such as black fungus up to 4 There are 17 species of 6 genera, covering an area of ​​1.1 million mu. There are more than 600 large fungi growing in the forest, which provides a good ecological environment for the growth and reproduction of black fungus. Kangxian black fungus is an excellent strain selected from the natural growth of wild fungus in Kangxian County. The fruit body is colloidal, the ear shape is irregular, and the shape is more chrysanthemum. The meat is thick and thick, fresh and soft, and the horny and color after drying. Black brown. Kangxian black fungus is cultivated with segment wood. It is rich in cellulose, vegetable gum, fat and polysaccharide colloid. It is soft to the taste, lubricated, delicious and tender. It is a high-grade tonic and its nutrition is unique. The quality is well-known at home and abroad, and it is selling well in the market.