NOVELTY - Material overturning and conveying integrated device set inside a biomass destructive distillation cracking device comprises a variable-frequency motor (1) set on its uppermost part and located on an upper pyrolysis chamber of biomass destructive distillation cracking integrated device. The biomass destructive distillation cracking integrated device comprises an upper pyrolysis chamber and a lower pyrolysis chamber located in the periphery of a cracking chamber. A central rotating shaft (5) is located on the variable-frequency motor and it is connected to the variable frequency motor.    USE - Used as a material overturning and conveying integrated device.    ADVANTAGE - The device increases the residence time of the biomass material in the pyrolysis chamber and successfully conveys pyrolysis product to the cracking chamber.    DETAILED DESCRIPTION - Material overturning and conveying integrated device set inside a biomass destructive distillation cracking device comprises a variable-frequency motor (1) set on its uppermost part and located on an upper pyrolysis chamber of biomass destructive distillation cracking integrated device. The biomass destructive distillation cracking integrated device comprises an upper pyrolysis chamber and a lower pyrolysis chamber located in the periphery of a cracking chamber. A central rotating shaft (5) is located on the variable-frequency motor. The central rotating shaft is connected to the variable frequency motor along the main axis. The variable frequency motor drives the central rotating shaft. The upper rotary blade (6) is set on the upper part of the central rotating shaft. The middle rotary blade (7) is set on the middle part of central rotating shaft. The lower rotary blade (8) is set on the lower part of the central rotating shaft. The rotating direction of the upper rotary blade is opposite to the rotating directions of middle rotary blade and lower rotary blade.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of the material overturning and conveying integrated device set inside a biomass destructive distillation cracking device.    Variable-frequency motor (1)    Central rotating shaft (5)    Upper rotary blade (6)    Middle rotary blade (7)    Lower rotary blade (8)