The invention relates to a low temperature control method for aluminum electrolysis. 1) The electrolysis temperature during electrolysis is 930-936°C, the lithium carbonate content in the electrolyte is 2.8-3.0% of the mass fraction of the electrolyte, the molecular ratio of sodium fluoride to aluminum fluoride in the electrolyte is 2.3-2.5; the aluminum level is not low 2) Compulsory thermal insulation measures for the electrolytic cell: the bottom of the cell and the small window are sealed with aluminum silicate fiber blanket thermal insulation material. In the case of not changing the equipment and facilities in the production of aluminum electrolysis, by adjusting the electrolysis process, regularizing the furnace, realizing fine operation, improving the stability of the electrolytic cell, strengthening heat preservation, reducing heat loss, lowering the electrolysis temperature, and improving the current efficiency, the electrolytic cell The service life has been extended, and the effect of energy saving and emission reduction is remarkable, which provides a guarantee for the realization of safety, high efficiency, energy saving and environmental protection in electrolytic production.