Wine is a kind of unstable colloidal solution, how to prolong the stability period of wine, so that the wine does not produce oxidation, turbidity and precipitation phenomenon, has been the concern of wine producers. Recently, foreign wine and beer brewing has used PVPP to improve the stability of wine and improve the flavor of wine. PVPP is a fine white powder that can be used as a clarifying agent for wine. It is a very safe food additive after being added and filtered to remove residues. This food additive has strong adsorption, which can be seen from the molecular structure of PVPP. There are several ways in which PVPP can be used in wine. 1.PVPP cardboard filter 2. Single-use PVPP processing 3.PVPP can be recycled We found the effect of PVPP treatment in wine production by comparing with different clarifying agents 1. It can significantly improve the color of…