The invention provides a 
microwave treatment method and 
system for continuously increasing 
digestion resistance of 
potato starch. The method comprises the following steps of (1) preparing 
potato starch emulsion; (2) heating the 
potato starch emulsion obtained in the step (1), performing cooling, and performing 
microwave treatment and ultrahigh-pressure treatment; and (3) performing standing on 
starch milk cooled in the step (2), performing 
filtration, performing washing, continuing adding water to filter residues, performing standing, pouring upper-layer liquid, performing constant-temperature vibration, performing cooling and cleaning, performing 
ageing, performing sucking 
filtration, performing hot 
air drying, performing 
drying, and performing screening so as to obtain finished products of the potato 
starch. According to the 
microwave treatment method disclosed by the invention, improvement is performed from the technology and equipment, firstly heating treatment is performed on 
starch emulsion, then cooling is performed, then microwave treatment is performed, cooling is performed once again, constant-temperature vibration is performed, and in the microwave 
treatment system capable of continuously increasing the 
digestion resistance of the starch, starch raw materials are subjected to repeated heating and cooling, so that ordering and 
retrogradation effects of starch molecules are facilitated, and the formation quantity of the 
resistant starch is effectively increased.