Abstract: The finite element model was established according to a continuous casting roller size, and the work cycle and surface temperature of continuous casting roller were measured, and 20 s was determined as a work cycle. ANSYS software was used to calculate the temperature, stress and strain fields of the hard surface layer under the working condition. The changes in temperature, stress, and strain of the hard surface layer during multiple cycles and their failure risks were analyzed, and the measures to extend the service life of the hard surface layer of the continuous casting roller were proposed.The results show that within a working cycle of continuous casting roller, the highest and lowest temperature of the hard surface layer are 742, 132 ℃, and the maximum temperature difference is 610 ℃. The maximum stress of the surface layer of hard surface layer of is up to 1 030 MPa. The surface layer undergoes elastic deformation and plastic deformation successively, and the strain increases with the number of cycles, and the deformation variable of surface layer can reach 0.007 mm after 50 cycles. The elastic and plastic deformation of near-surface layer occurs later than that of the surface layer, and the maximum deformation can reach 0.004 7 mm after 50 cycles. The surface layer and the near-surface layer of the hard surface layer are subjected to significant stresses and larger strains during 50 cycles, but the surface layer is subjected to larger stress and strain, resulting in a higher risk of failure. It is recommended to start from the material itself, such as by adding elements such as Nb, Ti, V, etc, to improve the comprehensive performance of the hard surface layer and extend the service its life.