The invention discloses a glass powder for high temperature-resistant aluminum slurry. The glass powder is prepared from the following raw materials in percentage by weight: 10 to 50% of Bi2O3 (bismuth trioxide), 5 to 50% of B2O3 (boric oxide), 0.1 to 5% of SiO2 (silicon dioxide), 0.1 to 2% of Al2O3 (aluminum oxide), 5 to 20% of ZnO (zinc oxide), 1 to 20% of alkaline earth oxide, and 0.1 to 15% of one or combination of multiple of V2O5 (vanadium pentoxide), P2O5 (phosphorus pentoxide), Sb2O3 (antimonous oxide), MoO3 (molybdenum trioxide), WO3 (tungsten trioxide) and Cr2O3 (chromic oxide). The glass powder has the advantages that the chemical stability is good, the softening point is high, the material characteristic is short, the wetting property is good, and the technical problems of high temperature aluminum bulge, degrading of electricity, low water boiling-resistant property and the like in the existing aluminum slurry after high-temperature sintering are solved. The invention also discloses a preparation method of the glass powder for the high temperature-resistant aluminum slurry.