Abstract:In order to explore the nutritional value of Chinese summer truffle，pseudo-Himalayan truffle and Panzhihua white truffle，the water，protein，fat，crude fiber，ash，amino acids，vitamins，mineral elements，rare earth elements and heavy metals were detected by the methods of national standard.The results showed that the crude fiber of the three truffles accounted for 41.8%-52.8%，the protein was 29.8%，27.8% and 31.4% respectively，the fats were between 2.16%-2.80%，and the essential amino acids were 2.58 g/100 g-3.86 g/100 g.The tasteful amino acids were 3.33 g/100 g-4.78 g/100 g，accounting for 33.5%，40.4% and 40.2% of the total amino acids，which were much higher than the essential amino acids.They were rich in arginine，cystine and tyrosine，as well as mineral elements.The contents of potassium，sodium，calcium，magnesium，zinc，copper，manganese and strontium were higher in Panzhihua white truffle，and the content of selenium in Chinese summer truffle was higher.The moderate amount of rare earth elements，low heavy metals and pesticide residues were detected.The three truffles were therefore high quality flavoring foods with rich tasteful amino acids and arginine.