根据井下的实际工况,对液压支架整体箱式长推杆进行受力分析,并运用ANSYS软件对实际载荷分布状况进行模拟,将计算结果应用于推杆的结构优化,以实现简化结构、减轻重量、降低成本,为整体箱式长推杆的设计提供了有益参考。-A good design method to help us design a relay bar was provided.The result application shows the method can carry out predigesting structure,reduce weight and cost by ANSYS software within simulating actually mine s status.