NOVELTY - A device for roasting tobacco leaves through centralized gas supply by gasifying biomass energy sources mainly comprises a straw gasification furnace, an air storage tank, a heat exchanger and burners and an automatic control instrument.    USE - A device for roasting tobacco leaves through centralized gas supply by gasifying biomass energy sources (claimed).    ADVANTAGE - The device for roasting tobacco leaves through centralized gas supply by gasifying biomass energy sources combines a straw gasification furnace, an air storage tank, a heat exchanger and burners and innovates them. It is also simple to maintain and operate, needs a few operation personnel and only 2-3 persons for the entire system and is able to reduce labor strength of the operation personnel.    DETAILED DESCRIPTION - A device for roasting tobacco leaves through centralized gas supply by gasifying biomass energy sources mainly comprises a straw gasification furnace, an air storage tank, a heat exchanger and burners and an automatic control instrument, where fuel gas outlet at side of the straw gasification furnace is orderly connected in series with a two-stage spraying tower through pipelines; the posterior stage of spraying tower filled with filter mesh is connected with a cyclone dust collector through the air outlet at upper end of itself; the upper end air outlet of the cyclone dust collector is connected with the filter through a vacuum pump; the filter filled with a filter mesh is connected with the air storage tank through a steam-water separating flame arrester; the air outlet of the air storage tank is connected with a gas pipeline network through a flame arrester; the gas pipeline network is connected with the burners set in each roasting room; and the air outtake pipes of the burners are mounted on the air intake interface of the heat exchanger inside the roasting rooms in a communicating way.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of the device for roasting tobacco leaves through centralized gas supply by gasifying biomass energy sources.