The invention discloses a method for comprehensively recycling lithium elements in aluminum electrolyte by utilizing an acidifying roasting leaching process. The method comprises the following steps: S1, taking the aluminum electrolyte containing the lithium elements, and after pulverizing the aluminum electrolyte, uniformly mixing the pulverized aluminum electrolyte with acid salt so as to obtain a mixture; S2, carrying out acidifying roasting; S3, adding the mixture roasted in the step S2 into water, regulating the pH value, heating, filtering after reacting with agitating, and then detecting and keeping the concentration of lithium ions in filtrate for a standby purpose; and S4, adding carbonate into the filtrate obtained in the step S3, heating, and after reacting with agitating, filtering. The method for comprehensively recycling the lithium elements in the aluminum electrolyte by utilizing the acidifying roasting leaching process, provided by the invention, can recycle the lithium elements in the aluminum electrolyte, and at the same time, can also recycle and obtain high-purity cryolite. By adopting the method of the invention, the influence of the lithium elements on the production of the aluminum electrolyte is reduced, the stacking and waste problems of excessive aluminum electrolyte are solved, and a novel source is provided for the preparation of lithium salt.