In the era of COVID-19, many companies take unpaid holiday or layoffs. Many employees are seeking self-protection in this uncertain era. They may not do their best for the company as they did in the past period. In order to encourage corporate employees to have high organizational citizenship behavior, this study constructs an "employee organizational citizenship behavior influencing factor analysis model" to analyze the influence of each factor on employees' organizational citizenship behavior. The analysis results show that organizational reputation, corporate social responsibility, organizational commitment and organizational justice have a significant influence on corporate employees' organizational citizenship behavior. Companies should maintain a high organizational reputation, corporate social responsibility and improve organizational justice in assessments to make them selflessly contribute to company.