用有限元法对生产建筑用中空方管铝型材的分流组合模的上模进行了计算与分析，结果表明：该模具的应力集中现象特别明显，应力分布极其不均，这无疑将严重影响模具的承载能力与使用寿命。为此，通过改变分流孔的形状和大小，设计了１副新的分流组合模。通过有限元计算，得到了改进后模具的等效应力分布图，使模具的应力分布非常均匀，应力集中明显减小 The finite element method is used to calculate and analyze the upper die of the split-flow modular die for the production of hollow square pipe aluminum. The results show that the stress concentration of the die is very obvious and the stress distribution is extremely uneven, which will undoubtedly affect the die Carrying capacity and service life. To this end, by changing the shape and size of the diversion hole, designed a new split modular. Through the finite element calculation, the equivalent stress distribution diagram of the improved mold is obtained, the stress distribution of the mold is very uniform and the stress concentration is obviously reduced