Preparation method of original sugarcane vinegar

The invention discloses a preparation method of original sugarcane vinegar. The method includes pressing sugarcanes, extracting sugarcane mix, boiling for sterilization, diluting with aseptic purified water to prepare fermentation liquid, inoculating the fermentation liquid to activated fruit wine yeast, and allowing for alcoholic fermentation for 14-20 days at the fermentation temperature of 25-32 DEG C; when initial alcoholic strength reaches (5+/-0.5) DEG C, adding activated LB acetic bacteria at 20-28 DEG C for acetic fermentation for 13-28 days; filtering and sterilizing after acetic fermentation to obtain original sugarcane vinegar. The preparation method is simple in fermentation process which is convenient to master.