Abstract: The prediction model of temperature field in the process of wearing water-cooled of angle steel was set up using ANSYS finite element analysis software.In the process of wearing water-cooled of the angle steel, it's thermal boundary conditions were studied, the finite element numerical simulation was carried out and distribution of temperature field and variation were analyzed, in which numerical simulation results are in good agreement with the experimental results.The results provide a theoretical basis and practical guiding significance to reveal the wearing water-cooled law of angle steel, developing device of wearing water-cooled of angle steel and cooling technology.