The utility model discloses an automatic coal leak protection cigarette heating device, it belongs to the tobacco processing field. It mainly includes the furnace body, is equipped with the export ofchimney and heat source on the furnace body, and the lower part is equipped with the grate in the furnace body, and upper portion is equipped with heat abstractor in the furnace body, be equipped withthe automatic feed device on the furnace body, the automatic feed device includes the hopper, and the hopper bottom is equipped with the screw feeding ware, and the screw feeding ware is connected with the grate, and above the hopper is equipped with back the petticoat pipe, and time petticoat pipe passes through the pipeline and is connected with the chimney, the furnace body below is equipped with the air intake, is equipped with rotatory furnace gate on the air intake, and rotatory furnace gate is connected with motor A, and motor A passes through the control line and is connected with controlling means. The utility model discloses simple structure adds back the petticoat pipe, returns the petticoat pipe and is connected with the chimney, and the chimney goes out cigarette in -processformation local decompression, siphons away above the hopper's time cigarette to improve the production environment. The utility model discloses the mainly used flue -cured tobacco.