| Sweet potato granules is a kind of new dehydrated products, which could not only conserve the rich healthy nutrients of the raw sweet potato but also has the advantage of consuming less water during production, producing less wastes, having wide range for application. Using sweet potato as raw material, this study investigated the sweet potato granules production technology and found out the optimum processing conditions. The study also used different cultivars to make 56 kinds of sweet potato granules by above discussed production technology and determined their sensory indicators, physicochemical properties and functionalities. The quality evaluation system of the sweet potato granules was built by principal component analysis; the correlation between the raw sweet potato basic components and the quality of the sweet potato granules was definitized and the raw sweet potato cultivars which were fit for producing the sweet potato granules were sorted out .The results were as follows:1) The processing parameters which were used to produce the sweet potato granules: Cooking time:11.21～12.80min; Calcium soaking concentration:56.04～63.96ppm;freezing temperature:-31.81℃～-34.19℃.2) The quality evaluation system for the sweet potato granules: L*and b* in sensory indicators, physicochemical assessing indicators: free starch content and the yielding rate; emulsifying stability in functional indicators.3) The cultivars which were best fit for producing the sweet potato granules: shang 0110-3 and wutang number.14) The negative correlation between dry rate in raw sweet potato and b* in granules was found; The negative correlation between dissolvable sugar content in raw sweet potato and yield rate in granules was found,. The positive correlation between dry rate in raw sweet potato and yield rate in granules was found.
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