Objective To explore the status of professional identity and professional loyalty of standardized training resident during COVID-19 epidemic which provides a reference for development of strategy.Methods A questionnaire survey was conducted to 484 standardized training residents from two National standardized training base for resident doctors in Zhejiang. The survey was based on the indicators of “I gained social recognition and respect by engaging in this profession” and “I agree my children to engage in medical work” to analyze the status of residents' professional identity and professional loyalty. Using participation in anti-epidemic and clinical situations, attitudes to the COVID-19 epidemic, areas during the epidemic to analysis the relevant factors of professional identity and professional loyalty.Results On question of “I gained social recognition and respect by engaging in this profession”, the agreement rate of residents is 71.3% (345/484). On question of “I agree my children to engage in medical work”, the disagreement rate of residents is 46.3% (224/484). Residents who were on the front line of the battle against the epidemic (χ²=11.344, P=0.023) and who take a positive attitude towards the epidemic (χ²=7.614, P=0.022), have a higher professional identity. During the epidemic, the professional loyalty of residents who in Jiangsu, Zhejiang and Shanghai was higher than that in non-Jiangsu, Zhejiang and Shanghai (χ²=6.411, P=0.041). There is a positive correlation between professional training and professional loyalty of residents (r=0.386, P<0.01).Conclusions During the epidemic, the residents' professional identity was high, but professional loyalty was not raised. Participation in the battle against the epidemic, attitude towards the epidemic are relevant factors of professional identity. Areas during the epidemic and professional identity are relevant factors of professional loyalty. Priority needs to be given to the needs of residents who were on the front line of the battle against the epidemic, who were negative about the epidemic and who were in non-Jiangsu, Zhejiang and Shanghai. It is need to cultivate resident physicians' professional identity, thereby improving professional loyalty.