The energy contents of Apodemus chevrieri in field and in laboratory were measured.Our results showed that the body energy contents of A.chevrieri had seasonal variations.The energy contents were the largest in June,and the smallest in March.In cold-acclimation,the energy contents had significant decrease.The change pattern of the body energy contents in A.chevrieri was related to the macroenviroment such as low latitude,high elevation,and lower average ambient temperature.It had reflected survival mechanisms and the adaptive strategies of small mammals in Hengduan Mountainou Region.