“Signal and System”course experiment content is multifarious. In order to overcome the limitations of the tradi-tional hardware experimental system,a simulation experiment platform of“Signal and System”course was designed based on graphical user interface (GUI) in Matlab. The experiment platform consists of a main interface and several sub interfaces,in-cluding signal convolution,Fourier transform,Laplace transform,z-transform,frequency response of the system,etc. The simu-lation parameters of each experiment interface can be set and modify by users,and the simulation results can be displayed in real time. The platform translates the abstract theory teaching into vivid simulation experiment. Therefore,students' learning in-terest was evoked,and their understanding for the teaching content was deepened.%信号与系统课程实验内容繁杂，为了克服传统硬件实验系统的局限性，利用Matlab软件提供的图形用户界面（GUI）设计了信号与系统仿真实验平台。该实验平台由一个主界面和若干子界面构成，包括信号卷积、傅里叶变换、拉普拉斯变换、Z变换、系统的频率响应等实验项目。每个实验界面都可以由用户设定和修改仿真参数，实时显示仿真结果。该平台将抽象的理论教学转化为生动的仿真实验，从而提高学生学习兴趣，加深对教学内容的理解。
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