This study was conducted to investigate the effect of different levels of the red dragon (Hylocereus polyrhizus) fruit powder (2%, 4%, 6%) on hypercholesterolemic male albino rats. The study included 30 white male albino rats, weighing about (140 ± 10g), which were divided into (5) equal groups, each group (6) rats, one was kept as control (-ve) group, while the other (4) groups were induced hypercholesterolemic by the injection of Triton-x-100 (100 mg/kg body weight of the rat). Some biochemical analyses including, lipid profiles, atherogenic index (AI), glucose level, liver enzymes, kidney functions and hematological parameters have been determined. Also, the identification of phenolics compounds of the red dragon was done by using the HPLC method. The obtained results indicated that red dragon fruit powder contains different amounts of phenolics compounds, the highest levels recorded for catechin, chlorogenic acid, synergic acid, p-coumaric acid, ferulic acid. Data also showed a significant decrease in liver enzymes, kidney functions, serum glucose level and hematological parameters, lipid profiles (TC, TG, LDL-c, VLDL-c) in all treated groups, as compared to the positive control group, while HDL-c level increased. Therefore, red dragon fruit powder especially with a 6% level improved all tested biochemical analyses and could be considered therapeutic means for the treatment of hypercholesterolemia rats.