Extraction process of the yellow pigment from sunflower(Helianthus annuus var.nanus flore-pleno) was optimized on the basis of the preliminary exploration.The study was designed to provide a theoretical basis for the development of new pigment resources and the industrialized extraction.Organic solvent extraction was carried out.Extraction effect was represented with the absorbance of extracting solution under the maximum absorption wavelength.Quadratic regression orthogonal rotary tests were designed on the basis of single factor experiments.And the mathematical model of correlation among temperature,ratio of solvent to material,concentration of solvent and extraction effect was established.The results showed that the optimum extraction conditions were: the ratio of solvent to material 40:1(mL:g) with 70% ethanol,ultrasound treatment 15 min,extraction time 3 h under the constant temperature of 50 ℃.Under the above conditions,the absorbance of the yellow pigment was 0.781.