Abstract: The lipophilic constituents in poplar bud were extracted by ultrasonic wave assisted petroleum ether extraction method. The yield was 4.23%. The chemical constituents of petroleum ether extract were analyzed by GC-MS. Fifty one compounds in extract were separated and identified, the identified constituents accounted for 88.45% of the TIC peak area,mainly including terpenes 36.46%, flavonoids 14.72%, steriods 13.78%, aliphatics 10.19%, aromatics 9.33% compounds, etc. and most of these compounds have biological activity.

Key words: poplar bud, petroleum ether extract, chemical constituent, GC-MS