The invention discloses a method for quickly judging a fruit vinegar fermentation end point by utilizing an expiration type alcohol tester, which comprises the following steps of: 1) continuously detecting the content of alcohol in fermentation liquor in the fermentation process; 2) connecting the expiration type alcohol tester outside an exhaust port of a fruit vinegar fermentation tank to continuously test the content of alcohol in exhausted gas; 3) carrying out linear fitting through taking the content of the alcohol obtained in the step 1) as a variable and simultaneously taking the content of the alcohol in the gas obtained in the step 2) as an independent variable to obtain a linear fit equation; 4) calculating the content of the alcohol in the fermentation liquor according to the equation obtained in the step 3) and in combination with the content of the alcohol in the gas obtained in the step 2) and finishing the fermentation when the calculated content of the alcohol in the fermentation liquor is less than or equal to 0.1 percent. The method for quickly judging the fruit vinegar fermentation end point by utilizing the expiration type alcohol tester is simple, convenient and quick.