The utility model relates to a moving-bed pyrolysis chamber gas-steam joint producing furnace, which is characterized in that the material return between the combustion chamber of a circulation-bed and the pyrolysis chamber of a moving-bed adopts a material return structure in the type of artesian multiple points; simultaneously, a dust remover with a granular layer and a blind is arranged in the pyrolysis chamber; a self drying device is arranged on the upper part thereof. Because of the adoption of the technical proposal, the retention time of the material in the pyrolysis chamber can be effectively increased; the gas productivity of unit coal and the reliability of operation of the device can be increased; original dust concentration in the gas and steam rate for the gas can be decreased; a purification system for crude gas generated by the joint producing furnace can be improved; the thermal conversion efficiency of the gas can be further improved.