In recent years,the "lying flat" mentality has become widespread among college students,gradually evolving into a specific subcultural phenomenon. The emergence of this mentality may not stem from students' lack of learning ability or disregard for the value of education,but rather from an elevated perception of the costs associated with academic learning. Learning cost perception,which refers to students' subjective assessment of the potential negative outcomes associated with studying,is a core factor leading to poor academic adaptation. An in-depth analysis of learning cost perception is crucial for understanding the motivational deficiencies,such as the "lying flat" phenomenon,among contemporary college students. This study aims to clarify the conceptual framework and theoretical roots of learning cost perception,analyze its negative impact on students' academic development,and explore targeted interventions and teaching strategies. Through systematic review,the study seeks to elucidate the fundamental causes of the "lying flat" mentality,providing new perspectives and approaches for enhancing the quality of undergraduate education.