Abstract: ObjectiveTo examine the quality of sleep and its influencing factors among junior middle school students in Gaomi city. MethodsA sampling survey was carried out among 1 063 students of grade three in 3 junior middle schools with a self-designed questionnaire and Pittsburgh Sleep Quality Index(PSQI).Logistic regression was used to analyze related factors of sleep quality. ResultsThe mean PSQI score was 3.30±2.38 and the mean score was 0.65±0.02 for subjective sleep quality,0.74±0.02 for the time to fall asleep,0.31±0.02 for sleep time,0.20±0.02 for sleep efficiency,0.65±0.02 for sleep disorders,0.02±0.01 for sleeping drug application,and 0.74±0.26 for daytime dysfunction,respectively.Among the students,64(8.0%)reported sleep quality problems.Multiple factor analysis results showed that being happy in school(P=0.000)was a protective factor for the students to have good sleep quality.Seldom or never chatting with families were risk factors for good sleep quality,with the odds ratio(OR)of 2.806(95% confidence interval 95%CI:1.129-6.974)and OR of 15.498(95%CI:2.125-113.018). ConclusionThe general sleep quality is good among junior middle school students of grade three in Gaomi city and campus life and parent-child relationship are important influencing factors for sleep quality of the students.Comprehensive measures should be adopted to improve the sleep quality to promote physical and psychological health of the students.