Abstract:A method for the determination of total flavonoid contents in Pericarpium Citri Reticulatae Viride (Qingpi), Fructus Aurantii(Zhiqiao) and Fructus Aurantii Immaturus (Zhishi) was established by the use of TLC-densitometry. The results show that the total flavonoid contents in Qingpi and Zhishi are higher than in Zhiqiao. The content in Zhiqiao is 9.81%~15.85%.