The invention relates to the technical field of fresh keeping of vegetables, in particular to a fresh-keeping agent special for crowndaisy chrysanthemum and a preparation method of the fresh-keeping agent. The fresh-keeping agent is prepared from a
curcuma zedoaria extract, a turmeric fermented product, a pomegranate rind extract, a
Chinese gall extract, a
chili pepper fermented product, a salicylate ester, a tulip extract,
cyclodextrin, konjac
powder, a
passion fruit extract and a
chrysanthemum coronarium extract. The preparation method comprises the following steps of firstly, thoroughly mixing the
curcuma zedoaria extract with the pomegranate rind extract, the
Chinese gall extract, the tulip extract, the
passion fruit extract and the
chrysanthemum coronarium extract; performing treatment with a high-static pressure
electric field, performing transferring to a stirrer, adding the
cyclodextrin and the konjac
powder while during stirring, and after the
cyclodextrin and the konjac
powder are added, continuing performing stirring for 10min; then, adding the turmeric fermented product and the
chili pepper fermented product, performing
microwave treatment, then, adding the salicylate ester and performing uniform stirring so as to obtain the fresh-keeping agent. The fresh-keeping agent is used, so that the respiratory intensity of the
chrysanthemum coronarium can be restrained, theaccumulation of the content of
ethylene can also be restrained, and the reduction of
nutrient substances of minerals, VC,
chlorophyll and the like, in the chrysanthemum coronarium can be delayed.