Objective To analyze the sleep quality and influential factors of sleep in postgraduates and improve their sleep quality.Methods The pittsburgh sleep quality index (PSQI) and a self-designed questionnaire were adopted to survey 214 postgraduates.Results The mean score of PSQI was(4.49±2.32). The score for girls(5.13±2.69)was significantly higher than boys(4.28±2.15)(t=-2.33,P0.05).The influential factors of sleep quality among postgraduates mainly included lacking hobbies,trouble of love,irregular work and rest.Conclusion The sleep quality in postgraduates is not high. The influential factors to sleep quality among postgraduates are multiple,so synthetic measures should be taken to improve the sleep quality.