Objective To investigate early diagnosis,treatment and prev ention of tibia fatigue fracture. Methods From August 1988 to July 1999, 66 case s of tibia fatigue fracture were treated with exposure to the irradiation of Zho u Lin Spectrum Treatment Device, plaster splintage, according to their different clinic characteristics and results of X-gram.Results The 66 cases were followe d up for an average of 6 months. The result was excellent in 50 cases, good in 1 6, with the excellent and good rates of 100%. Conclusions As a result of a chro nic course of accumulative injury, the tibia fatigue fracture develops from quan titative changes to qualitative changes. It is essential for medical workers to have a good knowledge of the classification and features of the condition. It is also important for the army to make scientific and reasonable training plans fo r the soldiers.