The utility model provides an energy -efficient quickened lime rotary kiln, has horizontal tubulose gyration jiao jiao and personally experiences sth. Part of the body, gyration jiao jiao body one end is the air inlet housing, air inlet housing UNICOM air flue, the air flue meets gas producer, and the transit is stored for turning round to the other end of the gyration jiao jiao body, the gyration jiao jiao body is located on two bearings derail, and the gyration jiaojiao body is close to air inlet housing one end and is less than and keeps away from air inlet housing one end, gyration cellar for storing things external parietal tooth wheel is connected with the speed reducer through the second grade gear, and the speed reducer is connected with driving motor, the internal chamber of rotary kiln kiln is equipped with the heat preservation, insulation layer thickness more than or equal to 4 centimetre. Be equipped with bellied high more than or equal to 3 centimetre above the internal chamber of rotary kiln kiln or the internal chamber of the rotary kiln kiln heat preservation. Energy consumption and the problem of quality in the quickened lime production process have been solved effectively to this rotary kiln.