Objective To explore the relationship between the threat of infectious diseases

national identity and social support.Methods By using the method of convenient sampling

a total of 214 college students from 30 provinces and cities were selected as subjects.By carrying on the questionnaire survey via network

the data was analyzed.Results The results of correlation analysis showed that the total score of epidemic related support and its dimensions were positively correlated with the total score of national identity and patriotism（P<0.05）.The results of regulatory test showed that informational support or emotional support played a regulatory role in the relationship between the threat of infectious diseases and national identity.When the level of informational support and emotional support was higher

the level of national identity was higher

and the threat of infectious diseases did not affect the national identity.While when the level of informational support and emotional support was low

the higher the threat of infectious diseases

the higher the level of cognitive identity in subjects’ national identity.Conclusion In the context of the epidemic of infectious diseases

disease-related informational support and emotional support will enhance the national identity of the group.