Abstract: Objective: To explore the pathogenic characteristics and diagnosis of the epidemic hysteria.Methods: The following treatment methods were applied to the 7 groups with epidemic hysteria:isolation,desensitization therapy,suggestion therapy,psychological guidance,propaganda of popular science,instruction of mental health knowledge and so on.Results: Five of the 7 groups did not reoccur,and the other 2 cases with hysteria reoccurred occasionally.Conclusions: The pathogenesis of epidemic hysteria is related to special environment,psychological suggestion and individual cognitive ability.It presents varied forms and specific clinical manifestations at the onset.Correct diagnosis should be made as early as possible.