NOVELTY - Pyrolyzing system comprises a combustion main body with a combustion chamber formed inside, a gas inlet, multiple collecting ports and an outer cover wrapping the main body. The combustion main body is provided with multiple feed inlets connected to combustion chamber. The gas inlet is used for injecting combustion air. The multiple collecting ports are used to recycle end product of pyrolyzing reaction of organic biomass, and are set on combustion main body. A gas reaction zone is set between the multiple fuel reaction zones. A layer of catalyst is coated on tube wall of gas reaction zone.    USE - The system is useful for organic biomass.    ADVANTAGE - The system can guide combustion air into the gas reaction zone under the cooperation of the catalysis layer device for promoting combustion effect of synthesis gas and combustion air, and maintain heating state for adequate pyrolysis of organic biomass; improves generation efficiency of the recycled product, comprises outer cover wrapping the combustion main body to prevent heat loss; and improves usage efficiency of heat energy.    DETAILED DESCRIPTION - Pyrolyzing system comprises a combustion main body with a combustion chamber formed inside, a gas inlet, multiple collecting ports and an outer cover wrapping the main body. The combustion main body is provided with multiple feed inlets connected to the combustion chamber. The gas inlet is used for injecting combustion air and is connected to the combustion chamber. The multiple collecting ports are used to recycle the end product of pyrolyzing reaction of the organic biomass, and are set on the combustion main body. The multiple fuel reaction zones and their intervals are set in the combustion chamber, where each fuel reaction zone is a hollow tube with one end set correspondingly to the feed inlet for the input and breaking down of the organic biomass. A gas reaction zone is set between the multiple fuel reaction zones. The gas reaction zone is a hollow tube with one end set correspondingly to the gas inlet. A layer of catalyst is coated on the tube wall of gas reaction zone. A gas diversion zone is set between multiple fuel reaction zones and gas reaction zone. The gas diversion zone is connected to the other end of the multiple fuel reaction zones and the gas reaction zone. The synthesis gas obtained by pyrolyzing reaction of organic biomass is guided into the gas reaction zone through a gas guide flow zone, and is mixed with the combustion air for combustion.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic representation of the pyrolyzing system for organic biomass.