Abstract: Objective To analyze characteristics of different audiometric curves in sudden sensorineural hearing loss(SSNHL). Methods Retrospective analyze of 186 cases(200 ears)of SSNHL was performed, and were divided into four groups according to different audiometric curves. The clinical characteristics of these patients were analyzed, and their gender, deaf side, concomitant symptoms(ear tightness, tinnitus, vertigo), hearing loss degree and therapeutic effect distribution were compared. Results Among 186 cases(200 ears), there were 115 ears in males and 85 in females; 76 left ear, 96 right ears, and 28 bilateral ears; 191 ears complicating with tinnitus, 60 ears with vertigo; 12 ears in low-frequency descending group, 23 ears high-frequency descending group, 63 ears in flat descending group, and 102 ears in deaf group. After the treatment, the overall effective rate in 200 ears was 36.50%, with effective rate of 41.67%, 30.43%, 46.03%, and 31.37%, respectively, in low-frequency descending group, high-frequency descending group, flat descending group and deaf group. Gender, ear fullness, tinnitus, and curative effect showed no significant differences(P>0.05), but hearing loss side, hearing loss degree, as well as vertigo showed significant difference(P<0.01). Compared with pre-treatment, hearing was improved post-treatment. Conclusion Different types of hearing curve have different pathogenesis and therapeutic effect. The hearing curve of patients with sudden deafness is the most in total deafness type, and the - lowest in low-frequency decline type, of which flat decline type has the best efficacy, followed by low-frequency decline type and total deafness type, and high-frequency decline is the worst. The classification treatment is helpful to provide personalized diagnosis and treatment scheme, and provide reference for the prevention and intervention of hearing loss.