Sweet potato mash fermentation product and application thereof

The invention discloses a utilization method of mashed sweet potato waste, which comprises the following steps: adding a microbial agent into the mashed sweet potato waste for fermentation, increasing nutrient substances, the number of probiotics, pathogenic bacterium inhibiting substances and nematode inhibiting substances in mashed sweet potatoes, reducing the viscosity of the mashed sweet potatoes, and preventing the mashed sweet potatoes from decaying and stinking to form a mashed sweet potato fermented product with clear liquid and precipitate. And the fermented product has fresh scent. The mashed sweet potato fermentation liquor fermented by the strain emits the fragrance of apple vinegar, the probiotics effectively release nutrient substances of the mashed sweet potatoes, and the probiotics form antibacterial substances in the mashed sweet potato fermentation liquor, so that the quality of the mashed sweet potato fermentation liquor is effectively improved; compared with a method that unfermented mashe