Abstract:In order to analyze and evaluate the quality of cultivated melon in Xinjiang，the basic nutrients and sugars of five varieties of melons，such as Quaker Baire，Pishan，Flavor No.8，Green Meat Jiashi Melon and Jinlong，which were cultivated in Xinjiang，were analyzed and compared.The results showed that the basic nutrient contents of five different varieties of melons were significantly different.The highest moisture and pro-tein content of green meat Jiashi melon were 148.66 g/100 g and 1.36%，respectively.The minimum moisture and protein content of flavor No.8 was 73.65 g/100 g and 0.80%，respectively.Jinlong had the highest soluble solids and total sugar content of 12.60%and 8.40 g/100 g，respectively.Quaker's heat soluble solids and total sugar content were 8.30%and 5.60 g/100 g，respectively.The highest total acid content of flavor No.8 was 2.56 g/kg，and the total acid content of Jinlong was 0.68 g/kg.The main sugars of 5 different varieties of melon were fructose，glucose and sucrose，and no maltose was detected.The contents of fructose，glucose and sucrose were significantly different；the contents of calcium，potassium，magnesium，phosphorus，sodium，iron，zinc，copper and manganese in five different varieties were significantly different，while the difference in selenium content was not significant；the amino acids of five different varieties of melon The difference in total amount was significant，and its content was as follows：green meat Jiashi melon＞Jinlong＞Baishan＞Quikebaihe＞flavor No.8.In addition to the significant difference in alanine content among different varieties of melon，the content of other amino acids was not significant；succinic acid and adipic acid were not detected in 5 different varieties of melon，the main organic acid was citric acid，followed by apple acid，tartaric acid，fumaric acid.