The invention relates to a heating method and particularly relates to a heating method for sulfuric acid leaching of an aluminum-containing material. The heating method for sulfuric acid leaching of the aluminum-containing material is characterized by comprising the following steps: mixing the aluminum-containing material after crushing and water or a washing solution, and grinding; placing concentrated sulfuric acid in a sulfuric acid storage tank; heating slurry of the aluminum-containing material after grinding through a heat exchanger, and sending into a reactor; and directly sending the concentrated sulfuric acid without heating into the reactor through a pump, and mixing with the slurry of the aluminum-containing material after heating for reaction. The heating method disclosed by the invention has the advantages and the effects that the corrosion problem of equipment during the mixing and heating process of the aluminum-containing material and the sulfuric acid can be successfully solved, and the large-scale industrial production of aluminum sulfate or aluminum oxide by treating the aluminum-containing material through a sulfuric acid method further becomes possible.