The utility model provides a solar energy combination formula heating system for flue -cured tobacco, the top in roast room sets up solar energy heating system, the one end in roast room sets up the heating chamber, the outside of heating chamber sets up outer cabinet body, the heating chamber includes upper and lower two parts, the heating chamber lower part is hot -blast room, heating chamber upper portion is the circulation plenum, the circulating fan intercommunication is passed through with the circulation plenum in hot -blast room, the roast room of circulation plenum intercommunication, circulating fan realizes the air cycle between roast room and the hot -blast room, heat pump system is air source heat pump, heat pump system absorbs the hot -blast room air of heat heating in the air, dehumidification system is hot -blast indoor air dewetting, the hot -blast room air of solar energy heating system boosting. The utility model discloses an using air source heat pump to give first place to and providing the heat as tobacco flue -curing, solar heating supply utilizes the damp and hot air in the roast room of air dewetting technique extraction for tobacco flue -curing provides supplementary heat, and the heat in the damp and hot air of the technological recycle of heat pump simultaneously reaches energy saving and emission reduction's purpose.