The invention relates to a method for discriminating hygrophilous planting of interregional main food crops. The method comprises the following steps: dividing regions; dividing crops; calculating thewater requirement of the food crops every ten days; calculating the effective rainfall capacity within a growing period of the food crops every ten days; calculating the
irrigation water requirement;analyzing feature vectors of
crop production factors; normalizing; and discriminating the hygrophilous planting. The method is capable of, based on
virtual water and a water
footprint theory, establishing a discriminating formula for the hygrophilous planting of the main food crops by using an
analytical hierarchy process, and providing the method for discriminating the hygrophilous planting of the interregional main food crops by using the formula, objectively and comprehensively reflecting the food production and the water resource application, namely the effective rainfall capacity, the
irrigation water requirement and the spatial feature, and providing the scientific basis for the rationalized application of the
agriculture water resource and the hygrophilous planting distribution ofthe main food crops.