A finite element model of aluminum by laser irradiation was created by the COMSOL software,and the temperature field distribution of aluminum surface was numerically simulated.The influence of laser scanning speed,the value of superposition ratio η of two kinds of ideal models of TEM00 and TEM10 and material thickness on the transient temperature field of the material surface was discussed.The distribution and variation of temperature field of several points on the material were analyzed.These numerical simulation results show that with the increase of laser scanning speed,the energy absorbed by the material and the highest temperature of the material decreases.The value of η determines the energy distribution of the laser beam.With the increase of η,the energy density of laser beam concentrates increasingly and temperature variation of these points on the material in laser scanning is very large.With the increase of depth,the highest value of the internal temperature gradually decreases,and the temperature variation becomes flat gradually.