Abstract:To screen fresh sweet potato raw materials suitable for producing dried sweet potatoes based on the processing characteristics of sweet potatoes from different producing areas in Rongshui Miao Autonomous County,this study,using the “Xigua Hong” variety from four producing areas （Baiyun Township,Dongtou Town,Yongle Town,and Sirong Township） as test materials,measured the physicochemical components of sweet potatoes and the texture characteristics,sensory quality,and microstructure of dried sweet potatoes and conducted correlation analysis among them. The results showed that there were significant differences in the physicochemical components of fresh sweet potatoes from four different producing areas. Among them,fresh sweet potatoes from Sirong Township had the highest starch content and total dietary fiber content,at 169.71 mg/g and 1.24 g/100 g,respectively；fresh sweet potatoes from Baiyun Township had the highest reducing sugar content and protein content,at 117.36 and 77.32 mg/g,respectively；fresh sweet potatoes from Dongtou Town had the highest potassium content,at 12.85 g/kg. The starch content of fresh sweet potatoes showed a highly significant or significant positive correlation with the hardness and adhesiveness of dried sweet potatoes（P<0.01,P<0.05）,and the reducing sugar content exhibited a significant negative correlation with hardness and gumminess （P<0.05）. Dried sweet potatoes from Sirong Township had significantly higher hardness,adhesiveness,and chewiness compared to samples from the other three producing areas （P<0.05）,thereby having a tougher texture and poorer palatability （P<0.05）. However,dried sweet potatoes from Baiyun Township and Dongtou Town had lower hardness,a softer texture,and a fuller tissue structure,thereby having a better mouthfeel and higher sensory scores of 86.47 and 80.23,respectively. Based on the comprehensive analysis of microstructure,the fresh sweet potatoes from Baiyun Township and Dongtou Town,with higher reducing sugar content and lower starch content,are suitable for processing into dried sweet potatoes；the fresh sweet potatoes from Sirong Township,with a higher starch content,are suitable for producing sweet potato starch and sweet potato noodles；the fresh sweet potatoes from Yongle Town,characterized by a soft and powdery texture and sweet flavor,are suitable for fresh consumption.