Abstract: With the ultrasonic the sunflower meal ethanol extract(SMEE) was extracted by single factor analysis design, and the optimum extraction conditions were established as follows: the ratio of material to liquid 1:10, time 30 min, temperature 40 ℃. Results showed that the antioxidant ability of SMEE is higher than VC by method of reducing power. By method of 734 Rancimat determination results of the oxidative stability of lard showed that the antioxidant ability of SMEE reaches the highest when the concentration is 187.5 mg/L and at the same concentration compared with controls, vitamin C, vitamin E and BHA, the antioxidant ability of extract of sunflower is same as BHA, better than VC and less than VE.

Key words: sunflower meal, enthanol extract, antioxidant ability