The dispersion and multimode nature of a guided wave makes the analysis and identification of guided wave echoes complex. This paper proposes an echo identification method based on the frequency domain phase tracking. First, the frequency domain phase of the analyzed signals is extracted and normalized to the referenced signals of the direct propagation wave packet. Then, the normalized values are presented in an order spectrum. Finally, the location and recognition of each echo is determined with the analysis of the propagation path in the propagation medium. Simulation analysis and experimental results demonstrate the applicability and effectiveness of the proposed method.