The invention discloses a combustion room. The combustion room comprises a support and a box body arranged on the support, wherein a combustor is arranged on one side of the box body, two ends of the box body are respectively provided with a movable door, the support is provided with an upper track and a lower track, a first roller matched with the upper track is arranged above the movable doors, a second roller matched with the lower track is arranged below the moving doors, each movable door is provided with a rack, the support is provided with a drive device, gears matched with the racks are arranged on an output shaft of the drive device, a pipe is arranged on the other side of the box body, a circulator for air circulation is arranged on the pipe, and two ends of the pipe are respectively communicated with the upper end and the lower end of the box body so that hot air from the upper end in the box body is blown onto the lower end in the box body through a circulating fan, thus a mould in the box body is heated uniformly so as to avoid overlarge error of wall thicknesses of the manufactured combustion room.