目的 制备了一种九头狮子草红色素基膜，即九头狮子草红色素结合马蹄淀粉的新型比色指示膜。同时利用紫外–可见吸收光谱和灰度平均值探究其动态响应特征。方法 从植物九头狮子草中提取九头狮子草红色素(HPJH)，采用共混法将HPJH、马蹄淀粉、丙三醇共混制备比色指示膜。结果 引入九头狮子草红色素后，可以改变马蹄淀粉膜的抗氧化性。适量的九头狮子草红色素促进膜结构的均匀性，当添加质量分数为8%的九头狮子草红色素时，成膜效果最好，DPPH自由基清除率达到88.70%，膜颜色稳定性实验结束时ΔE值为1.649 7。以灰度平均值直观呈现比色指示膜在不同湿度条件下对三乙胺的响应情况，更具有说服力。结论 从植物九头狮子草中提取的HPJH可提高马蹄淀粉膜的指示效果，比色指示膜具有较强的抗氧化性，并对三乙胺具有颜色变化的响应性，在猪肉、鱼肉和莴笋新鲜度监测中具有动态响应特征。

The work aims to prepare a new colorimetric indicator film of red pigment of Herba Peristrophe Japonica (HPJH) combined with water chestnut starch, and study the dynamic response characteristics of the prepared colorimetric indicator film by UV-VIS absorption spectra and gray average values. HPJH was extracted from the plant of Herba Peristrophe Japonica. The colorimetric indicator film was prepared with blending HPJH, water chestnut starch and glycerol. The oxidation resistance of the film could be changed by the introduction of HPJH. Appropriate amount of HPJH could promote the uniformity of film structure. The film formation effect was the best, when the mass fraction of red pigment was 8%, and the DPPH free radical scavenging rate reached 88.70%. The ΔE value was 1.649 7, when film color stability experiment was end. It was more convincing to show the response of colorimetric indicator film to triethylamine in different humidity conditions by the average gray value. HPJH extracted from Herba Peristrophe Japonica can improve the indication effect of the water chestnut starch film. The colorimetric indicator film has strong oxidation resistance and has color change response to triethylamine. It has dynamic response characteristics in monitoring the freshness of pork, fish and lettuce.