The utility model provides a large-capacity energy-saving environment-friendly bulk curing barn. The large-capacity energy-saving environment-friendly bulk curing barn comprises a curing chamber and a heating chamber, wherein the curing chamber is provided with dehumidifying ports, and a heating device is arranged in the heating chamber. The large-capacity energy-saving environment-friendly bulk curing barn is characterized in that the heating device consists of a steam boiler and multiple steam radiators, the steam boiler is arranged outside the bulk curing barn, the steam radiators are dispersed in the heating chamber and the curing chamber, the steam inlet ends of the steam radiators are respectively communicated with a steam outlet of the steam boiler through steam pipes, water return ports of multiple heat radiating devices are respectively communicated with a water inlet of the steam boiler through water return pipes, and a heat radiating port of each steam radiator is provided with a fan. A smoke inlet track is arranged on the ground of the bulk curing barn. The bulk curing barn is provided with multiple dehumidifying ports which are respectively arranged under the two side walls of the bulk curing barn and at the position at same height with a cold air door. The large-capacity energy-saving environment-friendly bulk curing barn greatly reduces the building cost, meanwhile saves the cost of curing devices including coal furnaces, fans and the like, decreases curing workers and reduces the curing labor intensity.