Sudden sensorineural hearing loss is a frequent emergency in otology,and there are various pathogenesises currently,such as disturbance of inner ear circulation,viral infection and autoimmune response are generally accepted.However,the varied therapeutic treatments are mostly disoriented that we can't evaluate the clinical effects.So it is important to discuss the prognostic factors associated with the sudden sensorineural hearing loss,and provide guidance for clinical treatment.Here is to make a review of the influence of the factors that affecting the prognosis of sudden sensorineural hearing loss,including age,sex,ear side,treatment time,degree of hearing loss,comorbidities,audiological features,mental status,concurrent symptoms and genes.