The present invention relates to chemical-free sap extracted from agricultural products, to a method for preparing same, and to dehydrated food prepared from agricultural products. The present invention relates to a method for preparing sap and dehydrated food, to sap, and to dehydrated food, wherein the method comprises: a first step of selecting one or more sorted agricultural products, washing the selected agricultural products, cutting the washed agricultural products into a predetermined size, and feeding the cut agricultural products into a drier a second step of setting an operating condition of the drier in accordance with the agricultural products selected in the first step a third step of drying the agricultural products cut in the first step with cold air, the temperature of which is 0 to 28°C, which is within a temperature range lower than that of a hot-air drying temperature, so as to cause the moisture in the target agricultural products to evaporate a fourth step of drying the agricultural products dried with cold air in the third step with hot air, the temperature of which is 20 to 70°C, which is within a range higher than that of the cold air drying temperature, so as to cause the moisture on the inside of the target agricultural products to evaporate a fifth step of repeating the third and fourth steps to cause the moisture in the target agricultural products to further evaporate and a sixth step of condensing the moisture from the agricultural products which has been caused to evaporate in the third, fourth and fifth steps and which is in a gas state so as to collect sap.Cette invention concerne de la sève extraite de produits agricoles et exempte dagent chimique, son procédé de préparation, et un aliment déshydraté préparé à partir des produits agricoles. Cette invention concerne un procédé de préparation de la sève et de laliment déshydraté, elle concerne également la sève et laliment déshydraté, ledit procédé comprenant : une première étape con
