The invention provides a modulation facility of sun cured red tobacco. The modulation facility of the sun cured red tobacco comprises an air outlet cellar or a cave, and is also provided with a stacking support. The modulation facility can keep the humidity of the cellar or the cave at a humidity range of 65%-80% and keep the temperature of the cellar or the cave at 15 DEG C-20 DEG C. The invention also provides a modulation method of the sun cured red tobacco. The modulation method comprises the steps of establishing the modulation facility of the sun cured red tobacco, which comprises digging and establishing the cellar or the cave and putting up the stacking support; conducting sun curing; and conducting modulation of the red and dried tobacco leaves. Compared with the traditional modulation method, the modulation method of sun cured red tobacco reduces time sharply, is not influenced by overcast and rainy weather, and reduces sharply the phenomena of floating or withering of tobacco leaves; the obtained tobacco leaves have uniform color, oil content, fragrance and water content; the obtained tobacco leaves have more bright and shining color and luster.