To explore the relationship between the stress and the sleep quality of undergraduate students, as well as the mediating role of behavioral habit and perception of life regularity. Methods: The present study selected 569 undergraduate students from Beijing and Hefei, who participated in this study and adopted Stress Scale for College Student, College Students' Weekend Life Behavior Questionnaire, Perception Scale of Life Regularity, and Pittsburgh Sleep Quality Index, for investigating the level of stress, behavioral habits, perception of life regularity, and the sleep quality. Results: In the surveyed samples of college students, the scores of stress, behavioral habit, perception of life regularity, and sleep quality of college students were (1. 52±0. 87), (3. 37±0. 82), (6. 72± 2. 02), and (6. 55±3. 15), respectively. Pearson correlation analysis showed that sleep quality was significantly and negatively correlated with behavioral habit and perception of life regularity, sleep quality was significantly positively correlated with stress, and behavioral habit and perception of regularity of life were significantly positively correlated (P<0. 05). The mediating effect analysis results showed that stress not only had a direct effect on the sleep quality, but also influenced sleep quality by the chain mediating effect of behavioral habit and the perception of life regularity. Conclusion: The authors suggest that enhancing the development of behavioral habits among undergraduate students and the improvement of their perception of life regularity are conducive to the improvement of sleep quality.

目的：探讨大学生的压力源和睡眠质量的关系，以及行为习惯和生活规律性感知在其中的中介作用。方法：于2021年9月，在北京、合肥的几所高校选取612名本科生进行问卷调查，采用大学生压力源量表、大学生周末生活行为量表、大学生生活规律性感知量表、匹兹堡睡眠质量指数量表，分别反映大学生的压力强度、行为习惯强度、生活规律性感知强度、睡眠质量，得到有效问卷569份进行分析。结果：(1)在接受调研的大学生被试样本中，大学生的压力源、行为习惯、生活规律性感知、睡眠质量得分分别为（1.52±0.87）、（3.37±0.82）、（6.72±2.02）、（6.55±3.15）。(2)Pearson相关分析显示，睡眠质量与行为习惯、生活规律性感知显著负相关，睡眠质量与压力源显著正相关，行为习惯与生活规律性感知显著正相关（P<0.05）。(3)中介效应分析结果显示：压力源能够负向预测大学生睡眠质量，同时通过行为习惯和生活规律性感知的链式中介作用间接预测睡眠质量。结论：大学生行为习惯的养成和对生活规律性感知的提升，有助于睡眠质量的提高。