Research study was conducted at the Department of A.H. and Dairying, Sam Higginbottom University of Agriculture, Technology and Sciences, Small animal Nutrition laboratory at Prayagraj, India. The aim was to evaluate the efficacy of herbal preparation (Phyllanthus emblica and Curcuma longa) powder supplementation on caged broilers. The experiment involved four sets of day-old chicks, with each set comprising four groups: T0, T1, T2 and T3. The chicks in group Treatment0 were provided with a basic diet (as per FSSAI Specification), whereas chicks in Treatment1, Treatment2, and Treatment3 were fed a Controlled diet enriched with Indian gooseberry powder and Haldi powder, each single chick of them with an amount of 0.50%, throughout a four-week study period. Quantity of feed consumed each week and weekly records of the weight growth of the birds in each group were kept, and the feed conversion ratio (FCR) was calculated. The results of the study indicated significant variations in the average weight gain and FCR among the different treatment groups. Further analysis and interpretation of the data provided valuable insights into the efficacy of (Phyllanthus emblica and Curcuma longa) powder supplementation on the expansion efficiency of caged broilers.