The invention belongs to a largely improved milk-brewing technology in the food field by replacing milk produced in a physiological mechanism with milk produced by synthesizing milky juice obtained from green resources in a manual mechanism. The synthesized milk is prepared by using green marketable grain, beans, black beans, small red beans, sorghum and the like as main ingredients, adding natural auxiliary materials and condiments, fruits, and the like and processing the materials by a plurality of procedures. The material resources comprise the following seven categories: marketable grain, auxiliary materials, condiments, fruits, organic calcium bones, bird eggs and additives, thereby being healthy and natural plant milk with high nutrition, protein abundance, multiple elements and low fat. The synthesized milk can be drunk a long term safely and reliably by people without worry, has faint milk scent, suitable taste and scientific preparation and can be made into milk powder, liquid milk and various food compounds. Moreover, the invention is particularly suitable for infants, children, the middle-aged and the old to eat for a long time, does not contain melamine and any harmful substances so as not to damage the health of human beings and enables milking enterprises to make transition, remanufacture and regeneration without replacing the prior technology and equipment.