Abstract: To investigate the difference of growth, yield formation and quality of fresh- edible sweetpotato varieties with different yield levels, and provide references for breeding, two fresh-edible sweetpotato varieties with different yield levels‘Taishu No.14’and‘Yanshu No.25’were used as materials. The stem and leaf growth, root expansion rate, yield and quality at harvest stage were determined, and the variation was analyzed. The results showed that: the stem diameter, vine length, stem and leaf fresh weight, and leaf area per plant of ‘Taishu No.14’were higher than those of‘Yanshu No.25’. The underground part growth of‘Yanshu No.25’ was earlier than that of‘Taishu No.14’, while the growth rate of the underground part of‘Taishu No.14’at the later growth stage was faster than that of‘Yanshu No.25’. 80 days after planting, the weight per storage root and the storage root weight per plant of‘Taishu No.14’were significantly higher than those of‘Yanshu No.25’; marketing tuber ratio of‘Yanshu No.25’was higher than that of‘Taishu No.14’, storage root yield of‘Taishu No.14’was higher and dry matter yield was lower than that of‘Yanshu No.25’. The dry matter ratio, starch ratio and soluble sugar content of‘Taishu No.14’were significantly lower than that of‘Yanshu No.25’, β- carotene content was significantly higher and taste grade was lower than that of‘Yanshu No.25’. The stem and leaf function period of‘Taishu No.14’was longer than that of‘Yanshu No.25’, which made‘Taishu No.14’ have greater high- yield potential, and the quality and taste of‘Yanshu No.25’were superior to those of ‘Taishu No.14’