本文用非线性有限元法研究一种空间杆系与复合材料叠层板组合结构的非线性稳定问题。将杆系离散成空间梁柱单元，将复合材料叠层板离散成复合材料叠层板单元，并考虑了几何非线性和板的成层正交各向异性性质。为了获得较高的计算效率并顺利通过稳定临界点，求解非线性平衡方程采用了变增量步长和柱面弧长法迭代策略。在考证了程序的正确性之后，具体分析了几个工程模型，得出了于工程设计有益的结论。 In this paper, a nonlinear finite element method is used to study the nonlinear stability of a composite structure of space bar and composite laminates. The rod system was discretized into spatial beam-column units, and the composite laminates were discretized into composite laminates, and the geometric nonlinearity and the layer-wise orthotropic nature of the plates were taken into account. In order to obtain high computational efficiency and successfully pass through the stability critical point, an iterative strategy of variable incremental step size and cylindrical arc length method is used to solve nonlinear equilibrium equations. After verifying the correctness of the program, several engineering models were analyzed in detail and useful conclusions were drawn from the engineering design.