This study evaluated the effects of Lonicera flos extract and Scutellariae radix extract(hereinafter called plant extracts)on growth performance, immunity and antioxidant activity at levels of(125, 250 and 500 mg/kg). A total of 320 one-day-old healthy broilers(AA) were randomly allotted into 4 treatments with 8 replicates in each group, and 10 broilers per replicate in one cage. The experiment lasted for 42 days. The result showed that the broilers fed 500 mg/kg LS significantly increased average daily gain during 21-42 and 1-42 days(P<0.05), while ratio of feed to gain decreased(P<0.05). In addition, 500 mg/kg plant extracts significantly increased the thymus index and clearance index at 42-day(P<0.05). CAT activity in serum significantly increased and MDA activity decreased with the supplementation of 500 mg/kg plant extracts at d 21 and 42(P<0.05). Thus, diet supplementation with plant extracts at level of 500 mg/kg can enhance growth performance, immunity and antioxidant activity.