Fermented sparkling vinegar beverage and preparing method thereof

A preparing method of a fermented sparkling vinegar beverage, comprising following steps:

• primary fermentation:
• a plurality of natural materials and sugar are added into a naturally brewed vinegar, which is then placed in an environment of a maturing temperature, so as to be sealed and fermented for a first maturing time to form a raw vinegar;
• and
• secondary fermentation:
• the fermented raw vinegar is filtered out, and the raw vinegar is mixed with sugar, honey, salt, plant extracts, yeast liquid, and water in a pressure resistant container, which is then placed in the environment of the maturing temperature again, so as to carry out a secondary fermentation for a second maturing time, wherein the yeast strains of the yeast liquid are selected from a group consisting of Saccharomyces cerevisiae, Hanseniaspora osmophila, Hanseniaspora valbyensis, Torulaspora delbrueckii, and Dekkera bruxellensis, whereby the yeast strains generate a metabolite and produces bubbles in the fermented solution through fermentation, thereby alleviating a sour content of the raw vinegar.