The invention belongs to the technical field of preparation of inorganic glass materials, and in particular relates to a method for preparing rare earth aluminum silicate glass. The method comprises the following steps of: preparing a reactant consisting of aluminum (Al), MxOy, rhenium sesquioxide (Re2O3) and silicon dioxide (SiO2); obtaining rare earth aluminum silicate melt by utilizing the high temperature formed by the heat release of an aluminum heat system combustion reaction; and separating the rare earth aluminum silicate melt from metal melt under the action of a centrifugal force field to obtain the rare earth aluminum silicate glass. In the method, the continuous heating of an external heat source is not required, so energy is saved and energy consumption is reduced. Compared with the conventional method for heating and melting glass by using a high-temperature furnace, the method has the advantages of high speed, energy conservation and the like by utilizing the characteristic of high heat productivity of the combustion reaction, and can be used for preparing the rare earth aluminum silicate glass with higher melting temperature.