A vacuum deaerator is used to deaerate homogenized fruit juice in a vacuum state to prevent oxidation and extend the storage period of the juice. In fruit juice processing, the deoxygenation of the juice is mainly carried out by vacuum method, even if the juice is dispersed into a thin film or mist under vacuum to remove oxygen or other gases; The vacuum degassing unit is suitable for degassing and deoxygenation of various fruit juice beverages or other liquid foods in a vacuum state; After degassing treatment, fruit and vegetable juice beverages can reduce or avoid oxidation of juice components, reduce changes in juice color and flavor.