Objective: To understand physical exercises and associated factors among college students COVID-19 pandemic, and to provide a reference for promoting physical exercise of college students at home. Methods: A convenient questionnaire survey was used to investigate the physical exercise and associated factors of 1 132 college students in 6 colleges in Beijing. Results: A total of 1 033(91.25%) college students participated in physical exercise; with an average of(3.33±1.99)times per week, the length of each exercise was (39.24±13.23)min, and the subjective sense of exercise intensity was(2.61±0.99). Differences in exercise frequency, duration and intensity differed significantly by gender(P<0.05). Differences in exercise frequency were significantly by grades and places of residence(P<0.05). The exercise items of college students differed by genders and places of residence were statistically significant(P<0.05). Students with different exercise motivations showed significant differences in exercise behaviors(P<0.05). Multivariate Logistic regression analysis showed that grade, lack of interest in exercise, limited venues, incomplete equipment, family sports atmosphere, and school requirements were associated with participation in physical exercise behavior at home(P<0.05). Conclusion The status of home physical exercise for college students needs to be improved. It is necessary to combine college students exercise motivation and characteristics of exercise items based on school physical education,and to establish a family-school-society network interactive platform to form an effective linkage mechanism to promote college students active participation in physical exercise at home.