Abstract: The difficulties in the teaching of The Course Signals and Systems stem from the mutual penetration and multiple superposition effects of multiple links such as mathematical knowledge, physics concepts, and engineering background. The powerful data processing and intuitive graphical display of MATLAB help perform multi-dimensional interactive teaching and enhance students’ learning enthusiasm and initiative and its quick master can be started from MATLAB simulation of several core points. A typical example of a band-pass filter is used to describe the MATLAB implementation of solving key problems such as frequency spectrum, system function, zero-state response, and root locus, and give out the main steps that the MATLAB simulation should generally be used in the teaching of The Course Signals and Systems.

Key words: Matlab, The Course Signals and Systems, band pass filter