Abstract: Based on the measured vibration curve data of continuous casting mould,the motion characteristics of two sides of crystallizer were analyzed,and the vibration process of the crystallizer was simulated by finite element method using Ansys software,and the stress distribution of the slab was obtained.The results show that the relative rotation of the mould in the process of vibration results in relative extrusion and deviation of the slab; the narrow surface and corner area of the billet are affected by relative extrusion of the mould,and the stress increases with the increase of the distance from the meniscus; when relative extrusion occurs,the corner stress at the bottom of the slab is affected by relative displacement and rotation of the mould,and with the increase of the relative extrusion distance from the meniscus.The relative rotation angle increases and relative displacement decreases,and the stress in slab increases.