A damage identification method is proposed, which is suitable for light-weight,high-strength beam structure.Aiming at the problem of positioning interference in the frequency sensitivity method of additional mass for use in the light-weight, high-strength structural damage detection, we combined the modal vibration of the structure with the strain energy, and proposed a damage identification method, which could eliminate the damage location disturbance by using the structural strain energy.Numerical simulation and experimental verification were carried out respectively.The results show that the method has the advantages of both the frequency sensitivity method and the strain energy method in damage identification, and the damage location and damage degree can be identified more precisely.