Several typical cases of high temperature fault for supporting rollers of rotary kiln have been analyzed. As the main part of the rotary kiln supporting device, the supporting rollers'shafts and bearing of rotary kiln is prone to high temperature and even result in the kiln stop accident caused by the damage of the shafts and bearing , due to the influence of various factors such as the adjustment of kiln process operation or the deviation of installation, the lack of daily operation and maintenance management and so on. The occurrence of high temperature fault of supporting rollers'shafts and bearing can be effectively prevented by taking measures such as regularly testing the operation parameters of rotary kiln for comprehensively grasping the operation state of thermal equipment, and then timely eliminating hidden dangers of equipment.