Using full waxberry as raw materials, extraction technology of ethanol-soluble pigment assisted by ultrasound was investigated. Through one-factor-at-a-time method and orthogonal method, the optimum extraction conditions were obtained. The conditions of ultrasound pretreatment were as following: component of extract V(0.1mol/L HCl)︰V(95% alcohol)=6︰4, 5︰1(mL/g) of material-to-liquid ratio, ultrasound power 180 W, ultrasound temperature 45 ℃, ultrasound time 15 min. After ultrasound pretreatment, pigment ext...