Abstract:The storage and processing characteristics of three major planting varieties of sweet potatoes were studied. By comparing their main processing indicates such as the starch content， juice yield and reducing sugar content after extracting juice， the suitable one for processing concentrated juice was elected. Results showed that Yizi 138 maintained relatively stable moisture content， but its starch content was highest and average juice yield was only 21.51 % during the storage period. The soluble protein content of Longshu 9th ranked first in three， but it was unstable and fell fast. So Longshu 9th was suitable for short-term processing. However， the juice yield of red banana was significantly higher than another two species， and boasted of lowest starch content and highest sugar content. Therefore red banana was suitable for processing sweet potato concentrated juice.