混合模式仿真（ ｍｉｘｅｄ ｍｏｄｅ ｓｉｍｕｌａｔｉｏｎ） 是电路仿真领域内的最新发展方向，提出了将面向对象思想应用于混合模式电路仿真的新思路，以解决器件模型和仿真算法的可重用、易扩展性问题， 并以原型系统 Ｏ Ｏ Ｓｉｍ（ Ｏｂｊｅｃｔ Ｏｒｉｅｎｔｅｄ ｃｉｒｃｕｉｔ Ｓｉｍｕｌａｔｏｒ）为例， 系统地阐述了面向对象思想在混合模式电路仿真软件设计中的应用． Mixed mode simulation is the latest development trend in the field of circuit simulation. A new idea of ​​applying object-oriented theory to mixed-mode circuit simulation is proposed to solve the reusable and scalable problems of device model and simulation algorithm, Taking OO Sim (ObjectOliiented Simulator) as an example, this paper systematically expounds the application of objectoriented thought in the design of mixed-mode circuit simulation software.