In order to study the extraction and purification of flavonein C.cathayensis exocarp, organic solvent extraction was used to extrat flavone compound in C.cathayensis exocarp. Through single fraction experiments and orthogonal experiments, the optimal technological parameters were determined. The result showed the maximum extraction ration of flavone compound was 1.14% under the condition of 70% ethanol, time of 4h, temperature of 60℃, liquidsolid ratio of 15mL/g. Silica gel chromatography was used to purify falconoid, liquidsolid ratio of 3mL/g, gradient eluted by 70% ethanol at the speed of 2mL/min, the purity of flavone was improved by 34.6%, and its recovery reached to 89.46%. 