Digital signal process (DSP) experimental teaching plays a very important role in cultivating practical ability and innovative consciousness of students. To improve the practical and innovative ability of students, digital signal process experimental teaching is reformed from the perspective of experimental content, teaching mode and evaluation system. Hierarchical and multi-type experiments are designed. Flipped classroom based teaching mode is adopted. A diversified evaluation system emphasizing learning process is used. The teaching practice shows that students become the center of the digital signal process experimental class and their practical ability and innovative consciousness are enhanced significantly.