The invention relates to tobacco flue-curing equipment, namely, a powerful tobacco flue-curing stove taking straws as fuel. The furnace chambers of the existing tobacco flue-curing stoves are spaces provided with no components, which have the problems that oxygen is unevenly supplied and straw fuels are easily blown about and lump, thus causing unstable and incomplete burning, low heat efficiency, etc. In order to solve the problems, the chamber 5 of the invention is additionally provided with straw combustion-supporting mechanisms such as an air splitting plate 10, a material distributing rod 18, a material kicking-off rod 21, etc., which causes wind power to be more uniform and softer, space cavity inside the fuels to be suitable and more complete burning, thereby improving the heat efficiency of the straw fuels, greatly improving the properties of the tobacco flue-curing equipment which takes the straws as fuel and creating conditions for reducing tobacco flue-curing cost, saving coal, reducing environmental pollution and promoting the added value of residual straws of crops in rural areas.