Abstract: A method for evaluating antioxidant activities of varieties of fruits was developed based on the strong inhibition of the antioxidant the OH· on the chemiluminescence of luminol system.Twelve kinds of fruits such as strawberries of antioxidant activities in luminol concentration to 1 × 10- 3mol /L, 0.1s ultrasonic pulse duration, 10s ultrasonic pulse interval and sonochemiluminescence pool solution volume of 5mL under optimum condition was determined as follows: Gannan navel orange > bright red pomelo > willow orange > nectarine > kiwi fruit >strawberry > dragon fruit > cherry tomato > apple > nectarine > watermelon > muskmelon.