The invention relates to a low-temperature acid-resistant sintered glass powder, which comprises the following raw materials in percentage by weight: 30-70% of SiO2, 1-20% of B2O3, 1-10% of Al2O3, 1-20% of BaO, 1-20% of ZnO, 1-10% of TiO2, 1-20% of Na2O, 1-20% of K2O, 1-10% of CuO, 1-10% of MnO2 and 1-10% of P2O5, wherein the ratio of BaO to ZnO in percentage by weight is more than 1 and less than 2 and the total percentage by weight of Na2O and K2O is 6-25%. The preparation process of the sintered glass powder comprises the following steps: weighing, mixing materials, melting, tabletting, ball-milling and screening. The sintered glass powder has the advantages of low sintering temperature, high airtightness, high chemical durability and high acid resistance, and can be used for the inorganic adhesive phase of electroconductive electronic slurry, the glass paste used for a protective coating and etc.