The condition of purification of anthocyanins from Berberis kaschgarica by XAD-7HP macroporous resins was studied.The tests of screened resins and single-factor were used to determin the optimal technological parameters: 4 hours of adsorption time,60%ethanol as eluant,desorption time 100 min,pH 2.0,temperature 30℃.The concentration of anthocyanins is 750 mg /L and flow rate is 1.0 mL/min.Under the above optimum conditions,content of anthocyanins and colour value increased 3.15 and 2.21 times respectively in dark purple powder final product.