The propagation of Lamb wave in an aluminium sheet with a thickness of 4 mm was studied in this work. The propagation mode of Lamb wave in aluminium sheet is studied by combining the damage location principle of ellipse method and ABAQUS simulation software. By setting the observation point and collecting the signals of the Lamb wave at that point, the difference signal between the healthy aluminum sheet and the damaged aluminum sheet is calculated, and the propagation distance of the Lamb wave is calculated by combing the dispersion characteristics of the Lamb wave, thereby locating the defect position.The analysis of model finally verifies the feasibility and accuracy of finite element simulation of aluminum plate damage identification based on Elliptical method.