The invention discloses an asparagus fermented beverage with an auxiliary hypolipidemic function and a preparation method of the asparagus fermented beverage and belongs to the field of processing of fermented functional beverages. All shoots of asparagus are taken as raw materials, lactobacillus paracasei CICC6270 and lactobacillus paracasei CICC6271 are fermented, the dissolution rates of active ingredients, namely, saponin, flavone and polysaccharide, of the asparagus are increased remarkably, and asparagus fermented normal juice is obtained. By comparison with freshly squeezed asparagus juice, the dissolution rates of saponin, flavone and polysaccharide of the asparagus are increased by 8.68 times, 2.46 times and 2.95 times respectively. The asparagus fermented normal juice is taken as a main raw material, composition of a ginkgo biloba extract, a kudzuvine root extract, a panax notoginseng extract and a hawthorn fruit extract is added and has a synergistic interaction effect, and the hypolipidemic function of an asparagus fermented product is greatly enhanced. The product is pure natural, has no side effects, has the auxiliary hypolipidemic function and can be used for assisting treatment of hyperlipidemia, a coronary heart disease and other cardiovascnlar and cerebrovascular diseases caused by atherosclerosis.