The soil sterilizing machine is composed of an enclosed cylindrical heating chamber with a load capacity of around 60 kg. The cylindrical chamber is made of an ordinary oil drum with a reinforced a steel sheet at the bottom, the part which is directly subjected to heat. Fuel such as wood, charcoal, coconut shell or corn cobs can be used for heating. The machine can be closed on all sides. It is equipped with a chimney to maximize the heat transfer from the burning of fuel and to prevent smoke inhalation by the operator. The components of the sterilizing machine can be easily assembled and disassembled, making the machine portable. A stirrer composed of round and flat bars as bolt-on pegs and paddles are installed inside the heating chamber for mixing the soil to attain uniform heating. For the easy turning of the stirrer, a simple power train system made up of chain and sprockets is utilized. Using the machine results to a much faster sterilization time and reduced fuel consumption.