Replacing heavy oil with petrol coke can greatly reduce the cost of glass production, but obviously shorten the service life of refractories used in the regenerator checker body of glass tanks. To prolong the service life of the regenerator checker body, the slag chemical composition and alkali-sulfur ratio of glass tanks after using petrol coke and the damage mechanism of the residual magnesia bricks in the regenerator checker body were studied, as well as the corrosion resistance of three magnesia based bricks (direct bonded magnesia chrome bricks, fused rebonded magnesia chrome bricks, and fused rebonded high-purity magnesium aluminate spinel bricks). On this basis, a series of targeted countermeasures were adopted to optimize the configuration of refractories, significantly improving the service life of checker bricks and meeting the requirements of glass industry development.