The utility model discloses a stove of light -burned magnesium oxide of continuous calcination of magnesite pelletizing is vertical setting, and the kiln body comprises material of construction and insulation material, and the stove top is equipped with tail gas discharging equipment, its characterized in that, the inside top -down of stove are in proper order for feeding heating zone, combustion area, cooling district and ejection of compact district, and the feeding heating zone comprises expansion section, interlude and contraction section, are equipped with feed arrangement on expansion section upper portion, are equipped with gaseous fuel feeding device in the combustion area, and the district is equipped with air feeding device in the cooling, and the district is equipped with discharging device in the ejection of compact. The utility model provides a light -burned powder of the continuous calcination of magnesite pelletizing can be realized to the stove, has simultaneously that stove simple structure, manufacturing and maintenance cost are low, stove long service life and a convenient advantage of adjusting of light -burned whitewashed product activity.