The new molecular sieve PVC calcium-zinc composite stabilizer contains modified molecular sieve technology provided by the Chinese Academy of Sciences. It has a uniform microporous structure and can adsorb HCL molecules decomposed during PVC processing into the cavity, thereby achieving stable, weather-resistant and flame-retardant effects. This product complies with the requirements of the EU ROHS directive and has been certified by SGS. It can give the product good thermal stability, sufficient color fixing performance and excellent lubrication performance.