The invention discloses a solid lactobacillus nutrient beverage and a preparation method thereof. The solid lactobacillus nutrient beverage is prepared from 8% of lactobacillus powder, 21%-26% of fruit-vegetable powder, 24%-29% of white granulated sugar, 8%-13% of vitamin C powder, 9%-14% of vitamin B powder and 20% of albumen powder. The preparation method comprises the steps that the fruit-vegetable powder is prepared; qualified vitamin C tablets, vitamin B tablets, white granulated sugar, lactobacillus powder and albumen powder are bought from the market, after screening and distinguishingare completed, the albumen powder is put into a sterilization cabinet to be sterilized; the sterilized fruit-vegetable powder, vitamin C powder, vitamin B powder, white granulated sugar and albumen powder are selected to be mixed and screened according to a proportion, and then the preparation is completed; the own nutritive value of the beverage is greatly increased by grinding and then sterilizing all the raw materials except the lactobacillus powder through a hot dry sterilizing chamber, slightly increasing the content of the lactobacillus and containing fruit-vegetable nutrient substances.