The invention discloses an internal-circulation bulk curing barn realizing complementation of multiple energies. The internal-circulation bulk curing barn comprises four parts, including a tobacco loading chamber, a heating chamber, a dehumidifying chamber and a system master controller, wherein three heat transfer devices in the heating chamber carry out heat exchange with air in the heating chamber by adopting solar energy, air energy and electric energy, with the tobacco loading chamber, damp and hot air separating out in the tobacco leaf curing process is exhausted into the dehumidifying chamber for cooling and dehumidification, the damp and hot air after cooling and dehumidification returns to the heating chamber to be heated, and the system provides heat and eliminates humidity by adopting the complementation method according to the baking process curve and the temperature and humidity in the tobacco loading chamber. The internal-circulation bulk curing barn realizing complementation of multiple energies has the beneficial effects that a heat source is provided in a complementation manner by adopting four energies including solar heat collection, air energy, solar photovoltaic and electric energy, the dehumidification manner combining internal-circulation dehumidification and total heat recovery dehumidification is adopted, thus the curing cost can be reduced, the temperature rise time can be shortened, the system master controller is adopted for realizing control, so that the manual operation can be reduced, the labor intensity can be alleviated, the control precision can be promoted, and the tobacco leaf curing quality can be improved.