Introduction: This longitudinal study aims to investigate the relationship between fear of COVID-19, support-seeking behaviors, and perceived social support among Chinese college students during two distinct periods of the COVID-19 pandemic: the period of strict control (time 1) and the period following a relaxation of restrictions (time 2).Methods: A total of 408 Chinese college students participated in this study. Data collection included demographic information, measures of fear of COVID-19, support-seeking behaviors, and perceived social support.Results: Fear of COVID-19 at time 1 showed a significant positive association with fear of COVID-19 at time 2. The relationship between support-seeking behavior at time 1 and fear of COVID-19 at time 2 was significantly mediated through a chain mediation effect of support-seeking behavior at time 1 and perceived social support at time 2.Discussion: This study contributes to the growing body of evidence on the psychological impacts of the COVID-19 pandemic and underscores the significance of social support in mitigating fear of COVID-19. It calls for a re-evaluation of public health policies considering their potential psychological effects and introduces new opportunities for developing psychosocial interventions. [ABSTRACT FROM AUTHOR]