The aim of this experiment was studying the efficacy dietary dried powders’ of ecofriendly natural antioxidants of beetroot (Br), grape pomace (Gp) and willow (W) in two concentrations 0.5 and 1 % as an anti-heat-stressor and their impacts on performance and thermo-tolerance state on broiler’s housed under thermal-stress averaged (33◦C). 630 Ross-308day-old-chicks were used. The treatments were applied after 2 weeks of starter feeding as beginning grower feed then finisher diet until 42d marketing age. The treatments were as follow: T1:Control (basal diet BD); T2 (1% Br+BD); T3 (0.5% Br+BD); T4 (1%GP+BD); T5 (0.5%GP+BD); T6 (1%W+BD); T7 (0.5%W+BD). Complete Random Design (CRD) used on three replicates/treatment; thirty bird/rep. The results indicate that both Br and Gp in both (0.5; 1%) levels improved growth performance except birds in W 0.5% wasn’t affected and W 1% decreased significantly than Control. The PEF was significantly higher in each of T2, T3, and T4 groups than Control group. All natural antioxidants dietary supplemented enhanced body antioxidants; prevented oxidation; developed thermo-tolerance and stress expressions than the control group. It can be concluded that the antioxidant property of the eco-friendly additives used in the current experiment promoted the biological condition hence the thermally-stressed broilers' productive performance.