The topping desulfurization briquette machinery may use at the TX series boilers. At first the raw coal is screening into fine coal and lump coal. The fine coal is produced into briquette. The lump coal and briquette are sent separately into the grate of travelling grate stoker boiler, the lump coal is at bottom and the briquette is on the top at the grate. This method is a new concept and the cost is lower.