By single factor experiment and Response Surface Methodology,the effect of extraction time,solidliquid ratio,extraction temperature,and ethanol concentration on the pigment extraction were studied. Using extract absorbance value as the response index,pumpkin skin pigment extraction conditions were optimized by response surface. The results showed that the optimum extraction conditions were: extraction time 1h; the ratio of material to liquid1: 20; extraction temperature 60℃; ethanol concentration 90%. Under such conditions,the absorbance was0. 498,the theoretical prediction value was 0. 502. The relative error is about 0. 004,the optimized response surface equation is useful. Study on the stability of Pumpkin Peel pigments showed it is unstable in the light and strong acid condition( p H < 3),It is relatively stable at the temperature between 20 ~ 60℃ and acid condition( 4 < p H < 7) alkaline( 7 < p H < 9). Within the Maximum usage by food standards,it is not affected by food additives,citric acid,soluble starch,sucrose,glucose. Therefore,it can be used as food coloring. Pumpkin skin pigment has good stability,the pigment extracts add more value on the raw material source,the pigment has a good prospect of development and utilization.