为避免简化力学模型给机床主轴系统静特性分析计算带来误差，在总结国内外研究成果的基础上，提出“卸积木式”力学模型。在优化方法上，对传统的复合形法作了改进，加快了收敛速度。该软件不仅提高了计算精度，而且通用性强，使用方便。 In order to avoid the error caused by simplifying the mechanical model analysis and calculation of the static characteristics of the spindle system of the machine tool, a mechanical model of “unloading wood” was put forward based on the research results at home and abroad. In the optimization method, the traditional complex method has been improved and the convergence speed has been accelerated. The software not only improves the calculation accuracy, but also is versatile and easy to use.