Abstract: A new approach to the structural health monitoring for aluminum plate was proposed, namely a kind of approach combining magneto-mechanical impedance with guided ultrasonic wave, and its feasibility was proved by simulation research. The technology of ultrasonic Lamb wave has the advantages of far propagation distance, wide detection range and accurate damage location, but its local sensitivity is low and the identification of damage extent and type is not ideal; the sensitivity of impedance technique is very high, but the range of detection is limited and the damage is difficult to locate. Combining their advantages of the two approaches for structural health monitoring can detect all damage information. Besides, a comprehensive damage index obtained by the integration of the data of magneto-mechanical impedance and guided ultrasonic wave is proposed to qualitatively identify the damage extent and type with different varying ranges of index.