Sweetpotato is an important starch crop with high resistant starch(RS)content in tuberous root,hav-ing great potential for product development.In order to further promote the application and marketization of sweet-potato RS,it is necessary not only to screen or cultivate sweetpotato varieties with higher RS content,but also to fur-ther develop sweetpotato starch products.Apart from controlling the expression of genes involved in starch synthesis,RS content of sweetpotato can be increased by adjusting cultivation measures in practice.In addition,the RS content of sweetpotato products can be increased by chemical modification,physical method and enzymatic hydrolysis.In this paper,the health care effect of sweetpotato starch,the determination method of RS content,the factors affecting RS content in sweetpotato starch,the preparation method of RS and its characteristics reported in recent years were sys-tematically reviewed,providing reference for the preparation,yield improvement,product development and populari-zation of sweetpotato RS in the future.
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