Objective: To investigate the social support of non-COVID-19 inpatients in the designated hospital for the COVID-19 patients, and to analyze the influencing factors of the social support. Methods: The convenience sampling method was used. From February to March 2020, the Social Support Rating Scale (SSRS) was used to investigate the social support status of non-COVID-19 inpatients in a designated hospital for COVID-19 patients, and multiple linear regression was used to analyze the influencing factors. Results: A total of 110 valid respondents were investigated. The total score of social support was 44.61±33.61. The scores of the three dimensions from high to low were: subjective support (52.71 ± 8.43), objective support (49.5 ± 26.75), and utilization of social support (40.38 ± 14.63). Marriage, gender, education level, and whether to inform others about hospitalization incidents are independent influencing factors for non-COVID-19 inpatients' social support. The total social support score for the patient cared by spouse is higher than the patient who is cared for by others, and the total score for a patient with one sibling is higher than that for a patient with no siblings or two or more siblings. Conclusion: The social support of non-COVID-19 inpatients in the designated hospital is in a moderate level. Health professionals should provide more support for those non-COVID-19 inpatients who is male, married, lower education level, cared by parents and child, not revealing hospitalization to people around.