Fruit peel water is a kind of water fermented by utilizing fruit peel, which has unique taste and nutritional value. However, for the issue of fruit peel water fermentation time, many people have a misunderstanding that the longer the fermentation time, the better. In fact, the fermentation time of fruit leather water is based on different types of fruit leather and fermentation methods to determine, too long fermentation will affect the quality of fruit leather water. Different types of peels require different fermentation times. Some fruit peels, such as lemon peel, grapefruit peel, etc., contain a lot of acidic substances, and need a longer fermentation time to neutralize the acidity, while releasing more nutrients. Some peels, such as apple and pear peels, contain less acid and require a shorter fermentation time.