The invention provides a glazed brick production process, belonging to the technical field of building ceramic production. The production process comprises the steps of forming cloth material, applying ground coat, printing, applying cover glaze, sintering, polishing and grinding, wherein ground coat used in the ground coat applying step is phosphor-boron or boron-calcium multiphase opaque glaze, and the ground coat contains 0.5%-3% (in percent by mass) of anatase titanium oxide and 0.5%-5% of attapulgite. Compared with the prior art, the glazed brick production process provided by the invention has the advantages that the glazed brick production process is less in ink dosage, clear in color, and almost free of chromatic aberration color cast; moreover, inkjet blocking probability is lowered, cleaning and maintaining times of a spray head are reduced, production continuity is improved, and a situation of midway downtime rarely happens except from necessary maintenance.