Abstract: Objective To explore the relationships between psychological stress and physical activity(PA)among college students,and to provide basis for mental health education.Methods Using A dolescent Sel-frating Life Events Checklist(ASLEC)and International Physical Activity Que stionnaive(IPAQ)with reference of evaluation criterion by Unites States Center for Disease Control and Prevention and American College of Sports Medicine,we performed an intervention in 120 college students with different intensity of PA and psychology education,and analyzed the correlation between the PA and psycholo gical stress.Results The stress scores of high in tensity PA,mode rate in tensity PA,walking and the control group were 46.50±1.88,47.55±2.65,49.81±1.28,and 50.61±1.85,respectively,during the intervention,and 44.67± 1.75,46.51±2.20,49.37±1.15,50.50±1.82 after the intervention.There were noticeable changes in their stress level after the intervention(P<0.05).A linear regression model was constructed after intervention,suggesting a prediction of PA (95%CI=57.39-67.629)to psychological stress.Conclusion High and mode rate intensity PA had a positive effect on psychological stress in college students.