The invention provides a preparation method of ginger juice walnut milk. The preparation method comprises the following steps of: selecting, removing impurities, soaking, peeling, protecting color, grinding into thick liquid, separating, extracting ginger juice, burdening, blending, homogenizing, deodorizing and instantly sterilizing at high temperature. The ginger juice walnut milk beverage obtained through a series of preparation processes not only has the functions of brain strengthening, intelligence benefiting, aging resisting, constipation preventing, blood sugar reducing, sleep aiding,cardiovascular and cerebrovascular disease preventing, beauty maintaining, young keeping, delicious taste and the like of walnuts, but also is better in taste after the blended ginger juice is added,and has the effects of quenching thirst, relieving a cough, moistening the lung, preventing flu and the like. After the ginger juice walnut milk is subjected to blending, homogenizing treatment and vacuum treatment, the spicy peculiar smell which is difficult to accept by customers can be effectively removed, so that the beverage is fine and smooth in mouthfeel, and the requirements of the customers on nutrition and health care are met.