[Objective]To study effects of altitude on total flavonoids and enzymatic activity of Erigeron breviscapus.[Method]Through studying on total flavonoid content,PAL,4CL under different altitudes in Yunnan Province,the relationship between synthetic process and altitude was discussed.[Result] Total flavonoids content and enzymatic activity of Erigeron breviscapus showed negative correlation with altitude,but the correlation degree is not high,indicating that synthetic process may be affected by other reasons.[...