The invention belongs to the field of nutritional health food and particularly relates to a method for preparing a milk tea capable of preventing and curing neurasthenic. The milk tea mainly comprises the following components: jujube, medlar, lotus, longan, mulberry, tomato, lily, daylily and milk. The method comprises the steps of superfine crushing, mixing and squeezing the components, decocting the components by adding water, filtering, condensing, sterilizing and packaging the components so as to obtain the finished product. The prepared product contains much protein, sugar, fat, vitamin B, C, and E and various inorganic mineral matters so as to provide a large amount of nutrition ingredients for the brain, thus maintaining normal running of the nervous system. The nutrition ingredients of the raw materials such as jujube, medlar, longan and the like are adopted to supplement Qi and nourish blood, the daylily and tomato contain a large amount of iron elements so as to prompt the hematopoietic function and reinforce the blood-nourishing effect of the product; and the lotus and lily have the effects of calming mind and benefit intelligence and have better effect in adjusting neurasthenic.