The invention relates to the technical field, in particular to a cultivation method for ipomoea aquatica rich in organic chromium. The method includes the following steps of a, seed soaking and pregermination, wherein ipomoea aquatica seeds are put in the sun to be dried, and then soaked with a normal-temperature water solution and pre-germinated; b, land selection and preparation, wherein sandy soil land is selected, base fertilizer is sufficiently applied, and then the land is prepared and beds are formed; c, sowing, wherein the ipomoea aquatica seeds are sown on bed planes, straw is laid on the bed planes, and watering is carried out properly; d, field management, wherein top dressing, weeding and pest control are carried out regularly; e, harvesting, wherein ipomoea aquatica is harvested multiple times, and every time the ipomoea aquatica grows to 26 cm or above, the ipomoea aquatica can be harvested once. According to the cultivation method for the ipomoea aquatica rich in organic chromium, the content of organic chromium in the ipomoea aquatica can be effectively increased, the nutritional value of the ipomoea aquatica is improved, and the planted ipomoea aquatica further has the advantages that leaves are tender, stems are crispy, and the edible taste is good.