Abstract: In order to screen out the superior Chinese yam varieties suitable for Mingxi County with high yield, high quality and high resistance, 21 new Chinese yam varieties were introduced from all over the country in 2019 for the comparative test to comprehensively investigate the yield, stress resistance, tuberization capability and taste of each variety. The results showed that the yield of Masha local big potato and Wuyishan purple yam per 667 m² was 3 784.64 kg and 3 541.90 kg respectively, and the yield was increased by 15.31% and 7.92% respectively, compared with that of Mingx Chinese yam No.1. The two varieties could be experimentally planted in the small area as the big potato varieties of Chinese yam. The yield of Ansha lobular potato per 667 m² was 2 519.68 kg, with strong vine growth, better disease resistance, superior quality, short and thick potato blocks, easy to dig, high commodity rate and good overall economic benefits, which could be used as the key promotion trial. The meat of Zhejiang Wencheng glutinous rice yam and Zhejiang Wencheng nutrition glutinous rice yam was white, with glutinous strong and good taste. And due to June potato and July potato had the charateristics of short growth period, they could be put on the market when ripening in June and July every year. So, the 4 varieties could be experimentally planted in the small area as the characteristic varieties. The 7 varieties of Guangxi Ziyu yam, Hongpibaixin, Baitiao yam, Yangmingshan yam, Masha little yam and Masha shell yam had the advantages of higher yield, stronger vine growth, better disease resistance and better quality, etc. Therefore, the experiment demonstration of the new varieties of Chinese yam could be carried out by combining the variety test and the expanding propagation.