“信号与系统”课程知识点多、理论性强,长期存在教师难教、学生难学的问题。提出“主线式”教学方法,以问题为先导,以分析、解决问题的不同分析方法、分析思路为主线,串起课程各个章节,在教学实践中取得了较好授课效果。 “Signal and System ” course more knowledge, theoretical, long-term teachers difficult to teach, students difficult to learn the problem. Put forward the teaching method of “main line”, taking the problem as the forerunner, taking the different analysis methods of analyzing and solving the problem as the main line, strung together the chapters of the course, and achieved good teaching results in the teaching practice.