The invention discloses a swing type rotary furnace which comprises a roller. The roller is formed in the manner that multiple cylinder modules are in bell-and-spigot joint along the axis of the roller through flexible bell-and-spigot structures in an opposite moving and sealed manner. When the roller expands and is lengthened when heated, the cylinder modules in bell-and-spigot joint can oppositely move at the connecting positions, the sleeved connecting length is increased through the cylinder modules, compensation of temperature deformation is completed, and the phenomenon that the length of the overall roller is changed greatly due to the influences of temperatures is avoided; and the relative positions of the roller, a supporting device, a driving device, a movable guide pipe assembly and the like cannot be changed, and therefore normal running of the swing type rotary furnace is ensured.