Digestion furnace

The utility model provides a digestion furnace. Wherein the digestion frame comprises an upper top plate and a concave plate, the upper top plate is connected with the concave plate, a plurality of liquid adding holes are formed in the upper top plate, a plurality of digestion tube holes are formed in the concave plate, the plurality of liquid adding holes correspond to the plurality of digestiontube holes, a digestion tube is accommodated in each digestion tube hole, and the diameter of a tube opening of the digestion tube is larger than that of each digestion tube hole; the connecting partcomprises a lifting rod and a control button disc, one end of the lifting rod is connected with the connecting part, the other end of the lifting rod is connected with the concave plate, a lifting rodlifting button and a lifting rod stopping button are arranged on the control button disc, and the lifting rod lifting button and the lifting rod stopping button are electrically connected with the lifting rod; the heating devi