To meet demands of the certification and disciplinary development of new engineering education, the teaching materials and mode for digital signal processing course need to change from traditional to modern ones based on micro class. Reform measures for digital signal processing course are introduced from the aspects of teaching material design, flipped classroom exploration and evaluation mode. The teaching design based on micro class and flipped classroom is discussed, and the reform procedure of a hierarchical and process evaluation method is introduced. The results of our teaching reform show that the students' practical and innovative abilities are improved significantly, which can serve as a reference for other similar courses' teaching reforms.