Abstract: Aiming at the characteristics of “digital signal processing(DSP)” course, which include difficult to learn, too many theories and concepts, not easy to be commanded and so on, the paper applies the software of Matlab to theory and practice teaching, hoping it can improve the students’ comprehension of the course. Several typical applications as examples are set to guide the students take Matlab as a tool to confirm the relative principles through writing programs. Experimental results show that it not only improves students’ motivation and learning efficiency, but also trains the skills of solving problems; meanwhile it also cultivates the creative consciousness of students.

Key words: digital signal processing, Matlab, convolution, system stability, sampling theorem, spectrum analysis