Objective:To describe the current status of the resilience of the primary caregivers ′ families of patients with first-ever stroke and to explore the factors that influence it, in order to assist medical professionals in timely identification of related factors, formulate targeted nursing rehabilitation programs, and provide better support and care to patients and their families. Methods:Using convenience sampling, the primary caregivers ′ families of patients with first-ever stroke admitted to The First Affiliated Hospital of Naval Medical University of the People ′s Liberation Army of China and Shanghai Tenth People ′s Hospital from May 2021 to January 2022 were selected as subjects for a cross-sectional survey of family resilience. The Family Resilience Assessment Scale was used to evaluate the primary caregivers of first-ever stroke patients, and multiple linear regression was employed to clarify the influencing factors of the family resilience of primary caregivers. Results:A total of 307 questionnaires were distributed, and 288 valid questionnaires were collected. There were 84 males and 204 females, aged ≤30 years old with 23 cases, aged 31-40 years old with 63 cases, aged 41-50 years old with 63 cases, aged 51-60 years old with 32 cases, aged ≥ 61 years old with 107 cases. The total score of family resilience of the primary caregivers was (210.80±17.32) points. Univariate analysis showed that there were statistical differences in the caregiver ′s occupational status, relationship with the patient, age, family residence, marital status, type of family, daily caregiving time, and the patient ′s gender and age with the caregiver ′s family resilience score ( t=2.06, -3.38, F values were 4.96-21.32, all P<0.05). The level of family resilience of primary caregivers was positively correlated with social support, positive coping methods, and family support ( r=0.375, 0.627, 0.642, all P<0.05), and negatively correlated with caregiving burden and negative coping methods ( r=-0.444, -0.563, both P<0.05). The multiple linear regression equation showed that social support, family support, positive coping, and negative coping were the main influencing factors of the family resilience of primary caregivers of patients with first-ever stroke ( t values were -6.68-6.27, all P<0.05), explaining 57.5% of the variance in family resilience. Conclusions:The family resilience of primary caregivers of patients with first-ever stroke is at a high level. Primary caregivers who receive more family support and social support, and who adopt positive coping methods and reduce negative coping methods, have higher levels of family resilience.