用三维弹－塑性有限元法对Ｈ型钢轧制过程中腹板单位压力分布规律进行模拟分析。将翼缘与腹板分开进行研究，利用可变刚度的伪单元模拟翼缘与腹板交接面。上特殊的金属流动关系，这比将翼缘与腹板整体考虑进行研究更符合实际。同时采用伪单元模拟轧制过程中金属表面与轧辊间的接触摩擦状态，较真实地表现了轧制变形区中存在滑动、粘着的摩擦特性。 The pressure distribution law of web unit in the process of H beam rolling was simulated by three dimensional elastic - plastic finite element method. The separation of the flange from the web was studied, and the pseudo-unit of variable stiffness was used to simulate the interface between flange and web. On the special metal flow relationship, this is more realistic than considering the flange and the web as a whole. At the same time, the pseudo-unit is used to simulate the contact friction between the metal surface and the roll in the process of rolling, and the frictional characteristics of the sliding deformation and the adhesion in the deformation zone are more realistically expressed.