建立了三维热力耦合问题弹塑性有限变形有限元方法，并对板材热轧过程进行了计算机模拟。材料流动应力模型中考虑了应变历史、应变速率和温度的影响，导出了与其相应的本构关系矩阵。应用该方法可以给出轧件变形过程中诸如温度场、应变场和应变速率场等各种热力结果。算例表明，该方法具有较好的精度。 The three-dimensional finite element method of elasto-plastic finite deformation was established and the hot rolling process was simulated by computer. The material flow stress model takes into account the influence of strain history, strain rate and temperature, and derives its corresponding constitutive relation matrix. This method can be used to give various thermal results such as temperature field, strain field and strain rate field in the deformation process of the rolling stock. The example shows that this method has better accuracy.