The utility model relates to a bulk curing barn of a concatemer assembled type biomass gasification furnace, which belongs to the technical field of tobacco bakeries in rural areas. The bulk curing barn mainly comprises an assembled type bulk roaster (1), an integral heat exchanger (2), a combined type multi-head burning furnace (3) and a biomass gasification furnace (4), wherein, the biomass gasification furnace (4) is connected with the combined type multi-head burning furnace (3) through a gas pipeline; the assemble type bulk roaster (1) comprises five roasters which are connected in parallel to be a whole; and one end of each roaster is provided with an integral heat exchanger (2). The utility model replaces a traditional tobacco roasting method, uses new renewable energy sources to replace coal, therefore fully meets the requirements of tobacco roasting process, and ensures the safety and the quality of tobacco roasting.