本文通过与拉梅理论解的比较证明空间等参元适用于对冷镦模进行应力分析。通过算例取得了圆形阴模内应力分布随压力区高度的变化规律。进而以M12螺母冷镦模为例,分析了六角形阴模在角点处的应力集中以及预应力过盈量对冷镦模应力场的影响,为模具的优化设计提供了方法和依据。 In this paper, by comparing with Lame theorem, space isoparameter is suitable for stress analysis of cold heading die. Through the example, the variation of the stress distribution in the circular female mold with the height of the pressure zone was obtained. Then the cold heading die of M12 nut is taken as an example to analyze the stress concentration of the hexagonal negative die at the corner and the influence of the pre-stress interference on the stress field of the cold heading die, which provides the method and basis for the optimization design of the die.