The constituents of essential oil from safflower ( Carthamus tinctorius L. ) in 4 localities were analysed by means of GC-M S-DS tech niques. The results showed that 10 constituentes of the essential oil from 4 localities are the same with different content, while the other various constituents are also present. The compound of linoleic acid which has physiological activity was identified from Jimusa′er county.