Method for producing carbon source and feed additive for sewage treatment by utilizing probiotic fermented plants

The invention relates to the field of sewage control and feed, in particular to a method for producing a carbon source and a feed additive for sewage treatment by utilizing probiotics to ferment plants. The method comprises the following steps: uniformly mixing a plant raw material, zymogen, water and aspergillus niger, and saccharifying to obtain saccharified biomass; oil meal, corn flour, water, molasses, a micro-ecological compound bacteria solution and the saccharified biomass are evenly mixed and then sequentially subjected to liquid fermentation treatment, after-ripening treatment and solid-liquid separation treatment, the liquid part obtained through solid-liquid separation is the carbon source for sewage treatment, and the solid part obtained through solid separation is the feed additive. According to the method, the carbon source for sewage treatment can be extracted by utilizing the waste biomass, meanwhile, the cattle and sheep feed additive with a health-care function is produced, and the method h