The chemical stability and anti-oxidative activity of the twokinds of water-soluble pigment material extracted from Japanese red Perilla and local Perilla were investigated. The results showed that the chemical properties of two kinds of Perillas were quite different; Pigment stability of Japanese red Perilla to heat and light was better than that of local Perilla. Both of anti-oxidative activity and contents of polyphenol and pigment of Japanese red Perilla are higher than that of local Perilla. There was a significant correlation between the anti-oxidative activity of Perillas and the level of contents of polyphenol and pigment. It was proved that there was a direct contribution of polyphenol and pigment in anti-oxidative activity of Perillas.%以日本红紫苏及本地紫青紫苏为材料，探讨了2种紫苏的水溶性色素物质的基本化学性质及抗氧化活性等.结果表明：不同种类紫苏的水溶性色素物质的化学性质有较大差异，红紫苏色素对热、光等的稳定性及多酚类物质含量、色素含量、抗氧化活性均高于紫青紫苏.多酚类物质和色素物质的含量与紫苏抗氧化活性之间存在显著的相关关系，证明了多酚类物质在紫苏抗氧化活性中的作用.
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