Method for preparing fruit vinegar by preserved fruit-processing waste sugary liquor

The invention provides a method for preparing fruit vinegar by preserved fruit-processing waste sugary liquor. The method includes the following several steps: step A, filtration comprising the step of filtering the waste sugary liquor to remove impurities; step B, clarifying comprising the steps of adding pectinas and clarifying; step C, decoloration comprising the step of decoloring the waste sugary liquor with activated carbon; step D, component regulation comprising the step of diluting the sugar degree of the sugary liquor; step E, temperature-controlled fermentation comprising the steps of adding angel yeast after activation into a fruit pulp, fermenting at room temperature, and removing the activity of saccharomyces cerevisiae, to obtain a pre-fermented liquid; step F, acetic acid fermentation comprising the steps of adding acetic acid bacteria after activation into the pre-fermented liquid, and fermenting; step G, membrane filtration; and step H, pasteurization. The method has the beneficial effects that the preserved fruit-processing waste sugary liquor is used fully, and waste is turned into wealth; the corresponding fruit vinegar preparation process is planned, no any artificial synthetic pigments, spices and preservatives are added in the preparation process, and the fruit vinegar has rich nutrition and has the efficacies of softening blood vessels, reducing blood fat and blood pressure and the like.