The invention discloses a method for electrolyzing aluminum at the low temperature in a deep eutectic solvent. The method comprises the following steps that a hydrogen bond donor and a hydrogen bond receptor are mixed according to proportioning, the deep eutectic solvent is obtained, then metal oxide is dissolved in the deep eutectic solvent, and a system serves as an electrolyte solution for electrolyzing. The method has the advantages that the deep eutectic solvent serves as the electrolyte, the deep eutectic solvent has common characteristics of ion liquid and further has the advantages ofbeing simple in synthesizing, low in price, high in purity and the like, and the deep eutectic solvent is the ideal solvent for electrochemical deposition of the aluminum; aluminum electrolyzing at the room temperature is realized, a bright, homogeneous and dense aluminum deposition layer is obtained, the adhesion ability of the aluminum deposition layer is improved, formation of dendrite aluminumis avoided, and the problem that a current deposition layer is prone to falling is solved; and gas generation and environmental pollution in the electrolyzing process are avoided.