Stoner-Wohlfarth模型是磁学的基本模型，然而传统求解方案只能获得三个特殊角度的解析解. 本文利用反函数的思路，得到了一般情况下该模型的简单解析解. 利用这一解析解，获得了描述静态磁性的磁滞回线，以及描述动态磁性的磁化强度运动轨迹. 解析解的获得，为定量化描述磁化强度一致转动的稳定方向和绕该方向的进动图像提供了简单、直观、准确的方案. 

The StonerWohlfarth model is a fundamental model in magnetism. However, the traditional solution methods can only provide analytical solutions for three specific angles. In this paper, by using the idea of inverse functions, a simple analytical solution for this model under general conditions is obtained. Using this analytical solution, the hysteresis loop describing static magnetism and the trajectory of magnetization intensity movement describing dynamic magnetism are obtained. The acquisition of this analytical solution provides a simple, intuitive and accurate scheme for quantitatively describing the stable direction of the uniform rotation of magnetization intensity and the precession image around that direction.