Abstract:The fruiting bodies of Auricularia auricula Baiyun No.6 cultivated with mulberry branch shavings as the main raw material are rich in nutrients.The various bioactive substances are elastic，tender，crispy and fragrant，and safe for consumption.Testing and analysis of the ingredients of fruiting bodies of Baiyun No.6 revealed several features.First，enriched nutrients included protein，fat，and crude fiber（11.4，0.6 g/100 g，and 4.64 g/100 g，respectively）.Enriched elements included potassium，calcium，phosphorus，magnesium，and sodium（1760，563，291，189 mg/100 g，and 34.05 mg/100 g，respectively）.Second，18 amino acids were enriched，with the total content reaching 8.329 g/100 g.Of these amino acids，42.61% were essential amino acids，60.51% were medicinal amino acids，and 35.18% were fresh amino acids（with some amino acids having more than one of these attributes）.Tryptophan was implicated as a characteristic or iconic component of black fungus.Third，fat-soluble vitamins included A and E.Water-soluble vitamins includedpagenumber_ebook=196,pagenumber_book=188，and niacin（pagenumber_ebook=196,pagenumber_book=188）.Niacin content reached 5 700 μg/100 g，which was 28.36，90.20 and 896.23 times the contents of VB2，VB1，and VE，respectively.Fourth，fruiting bodies were enriched in bioactive substances.The polysaccharide and pectin content was 11.6 g/100 g and 10.8 g/100 g，respectively.The mannitol，total purine，guanine nucleotide，and total flavonoid content reached 540，58.7，3.66 mg/100 g and 3.22 mg/100 g，respectively.Small amounts of tannin and β-carotene were detected.Finally，the contents of harmful components were lower than the stipulated standards.The fruiting bodies fully met the national green food standards.