Truancy in college is often an abnormal behavior for students. University education is to provide systematic knowledge and professional training. Absenteeism will make students miss important learning content and opportunities. The setting of university courses is carefully considered by the teaching plan and professional needs, and each course has its learning objectives and importance. Absenteeism will affect students' learning progress, understanding ability and grades, as well as their learning attitude and sense of responsibility. There are many other meaningful activities and development opportunities in college life, but students should take learning as their main task, arrange their time reasonably and pay attention to attendance. Active participation in classroom learning can help students acquire knowledge, cultivate critical thinking and problem-solving ability, and is also conducive to interaction and communication with teachers and classmates.