The invention discloses a high yield desulfuration boiler which comprises a boiler body, a flue and a processing chamber. An absorbent groove is formed above the left portion of the boiler body, an air blower is installed on the left side of the absorbent groove, a heat preservation layer is arranged on the outer side of the boiler body, the flue is fixed above the boiler body, a ventilator is installed at the right lower corner of the flue, the processing chamber is arranged at the tail end of the right side of the flue, a water tank is fixed above the processing chamber, a booster pump is installed on the left side of the lower portion of the interior of the water tank, a water pipe is arranged below the booster pump, a connector is installed below the water pipe, a spraying nozzle is fixed below the connector, a jetting opening is formed below the spraying nozzle, and a water inlet is formed in the lower right portion of the water tank. The high yield desulfuration boiler is provided with the absorbent groove, the absorbent groove is filled with limestone flour which can be dissolved into calcium oxide and carbon dioxide after heated, and the calcium oxide and sulfur dioxide influe gas react to generate calcium sulfite for desulfuration processing on the interior of the boiler body.