Energy-saving charcoal preparation stove

The invention discloses an energy-saving charcoal preparation stove which comprises a combustion chamber and a hearth. The hearth is rotatably connected with the combustion chamber, a partition plateis arranged in the hearth, an inner cavity of the hearth is divided into a first cavity and a second cavity, discharging doors are arranged at the upper end of the first cavity and the lower end of the second cavity, driving mechanisms are arranged among the discharging doors and the combustion chamber, a biogas pipeline is arranged in the combustion chamber and positioned below the hearth, a plurality of combustion heads are arranged on the biogas pipeline, the gas pipeline is connected with a biogas digester, and carbon collection troughs are formed among the combustion heads and the hearthand slidably connected with the combustion chamber. The hearth can rotate, and the inner cavity of the hearth is divided into the first cavity and the second cavity. When the stove is used for heating, biogas residues position