The invention discloses 
helianthus tuberosus ferment as well as a preparation method, preparation and application thereof. The 
helianthus tuberosus ferment consists of the following raw materials in parts by weight: 60-80 parts of fresh 
helianthus tuberosus, and 20-40 parts of 
sugar. The fresh helianthus tuberosus is used as the raw materials, so that on one hand, the prepared helianthus tuberosus ferment has special color and smell and is good in mouth feel, and the fragrances lasts long; and on the other hand, the helianthus tuberosus ferment is rich in special functional components of 
inulin, 
polyphenol flavonoid and the like in the helianthus tuberosus, and 
nutrient components of various natural vitamins, minerals, trace elements, amino acids and the like. According to the preparation method of the helianthus tuberosus ferment, normal-
temperature normal-pressure 
fermentation is adopted, and 
fermentation microorganisms come from preferable microorganisms in natural raw materials of the helianthus tuberosus, helianthus tuberosus tragon and the like, so that the helianthus tuberosus ferment is green and safe, notable in 
efficacy and strong in pertinence, has notable 
efficacy of improving 
flora of intestinal tracts of human bodies, resisting metabolic diseases of diabetes, high blood lipid and the like, eliminating free radicals, resisting oxidation, enhancing 
immunity, resisting tumors and the like, effectively strengthens 
metabolism, and achieves the purpose of strengthening bodies when being used for complementing ferment of the human bodies.