In the food industry, acetic acid is used as an acidifier, flavoring agent and fragrance when making synthetic vinegar, the acetic acid is diluted to 4-5% with water, and various flavoring agents are added. The flavor is similar to that of alcoholic vinegar, and the manufacturing time is short and the price is cheap. As a sour agent, can be used for compound seasoning, preparation of vinegar, canned, jelly and cheese, according to the production needs of appropriate use. It can also compose the aroma enhancer of incense wine.