Abstract: Using seed kernel of yellow-horn (Xanthoceras sorbifolia Bunge) as raw material,extraction technique of conjugated linoleic acid (CLA)from X. sorbifolia was researched in the experiment, and CLA was analyzed and identified by UV-spectrophotometry. The results showed that the optimum conditions were identified as follows: ratio of propanediol:KOH 0.6:1(mol:L), reaction temperature 180℃, reaction time 2 h,yield 58.34%;the antioxidation activity of CLA could be obviously increased by addition of 0.01% tea polyphenols +0.07% span 40+0.02% citric acid. Peroxide number of CLA was affected by various environmental factors, among which temperature ranked the first, light intensity took the second place, and humidity was the last.

Key words: Xanthoceras sorbifolia Bunge, conjugated linoleic acid, oxidation