NOVELTY - Pyrolysis gasification device comprises burner, pyrolyzer, gasifier three main reactor. The pyrolyzer is downstream bed fast pyrolyzer (3). The gasifier is bubbling bed gasifier (8). The burner is upstream bed oxidation burner (13). The upper part of downstream bed fast pyrolyzer is provided with material inlet (1). The material inlet is connected to distributor (2). The bottom of downstream bed fast pyrolyzer is provided with inertial separator. The side surface of inertial separator is sequentially connected to first cyclone, first bag filter, and first cooler.    USE - Pyrolysis gasification device used for coal or coal and biomass (claimed).    ADVANTAGE - The device uses semi-coke with catalytic activity, has heat carrying capacity, can achieve high quality tar, and generates gas and synthesis gas.    DETAILED DESCRIPTION - Pyrolysis gasification device comprises burner, pyrolyzer, gasifier three main reactor. The pyrolyzer is downstream bed fast pyrolyzer (3). The gasifier is bubbling bed gasifier (8). The burner is upstream bed oxidation burner (13). The upper part of downstream bed fast pyrolyzer is provided with material inlet (1). The material inlet is connected to distributor (2). The bottom of downstream bed fast pyrolyzer is provided with inertial separator. The side surface of inertial separator is sequentially connected to first cyclone, first bag filter, and first cooler. The bottom of inertial separator is connected to bubbling bed gasifier. The upper end of bubbling bed gasifier is connected to first cyclone, bottom water vapor, and oxygen inlet. The upper side of bubbling bed gasifier is sequentially connected to second cyclone, second bag filter, and second cooler. The bottom side of bubbling bed gasifier is connected with upstream bed oxidation burner. The bottom of upstream bed oxidation burner is provided with oxygen and air inlet. The upper part of upstream bed oxidation burner is provided with high temperature circulation and semi-half coke outlet connecting to third cyclone, fourth cyclone, third bag filter, and third cooler. The bottom of third cyclone is connected to downstream bed fast pyrolyzer. The bottom of fourth cyclone is connected to distributor. The bottom of second cooler is provided with soft water inlet. The second cooler, first cooler, and third cooler are connected in series. The upper part of third cooler is connected with high-pressure steam boiler. The bottom of high-pressure steam boiler is connected to bubbling bed gasifier inlet. An INDEPENDENT CLAIM is included for a method of using the device.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of pyrolysis gasification device.    Material inlet (1)    Distributor (2)    Downstream bed fast pyrolyzer (3)    Bubbling bed gasifier (8)    Upstream bed oxidation burner (13)