Abstract: The disclosure relates to a composition for improving aortic endothelial cell function and use thereof. The composition includes acetic acid, lactic acid, polyoxyethylene castor oil, and disodium alkyl polyoxyethylene sulfosuccinate. The composition is capable of inhibiting inflammatory response of the human aortic endothelial cells caused by saturated fatty acids, increasing a mitochondrial respiration and metabolism of vascular endothelial cells, and preventing an occurrence and progression of atherosclerosis. The composition is capable of reducing human aortic endothelial inflammation caused by saturated fatty acids, for example, reducing the mRNA levels of interleukin-6 (IL-6) and matrix metalloproteinase-1 (MMP-1), and is capable of effectively protecting the function of mitochondria in human aortic endothelium from being damaged by saturated fatty acids, for example, increasing the expression of mitochondrial complexes I and III and mitochondrial metabolism-associated Foxo1.