Objective To investigate the prognosis correlation factors of sudden hearing loss.Methods A retrospective analysis was performed in 137 cases (149 ears) of sudden hearing loss.The relationships between the age,prehospital delay time,type of hearing loss,degree of hearing loss,and whether with dizziness,tinnitus,diabetes mellitus,high blood pressure and therapeutic effect were observed.Results The total effective rates in ＜ 45 years,45-59 years and ＞ 59 years patients were 86.36％(38/44),77.78％ (56/72) and 57.58％ (19/33) respectively.There were statistical differences in the total effective rate between ＜ 45 years,45-59 years patients and ＞ 59 years patients (x2 =8.128,P =0.004; x2 =4.525,P =0.033).The total effective rates in patients who were treated ≤7 d,8-14 d and ≥ 15 d were 83.52％ (76/91),76.67％(23/30) and 50.00％(14/28) respectively.There were statistical differences in the total effective rate between patients who treated ≤7 d,8-14 d and patients who were treated ≥ 15 d (x2 =13.050,P =0.000; x2 =4.459,P =0.035).The total effective rates in low-mid frequency type,all frequency type,total deafness type and mid-high frequency type were 89.66％ (52/58),84.44％ (38/45),7/12,47.06％ (16/34) respectively.There were statistical differences in the total effective rate between low-mid frequency,all frequency type and total deafness type,mid-high frequency type (P ＜ 0.05).The total effective rates in hearing loss mild degree,middle degree,severe degree,extremely severe degree and total deafness were 87.23％ (41/47),86.11％ (31/36),61.90％ (13/21),7/15 respectively.There were statistical differences in the total effective rate between mild degree,middle degree and severe degree,extremely severe degree and total deafness (P ＜ 0.05).The hearing loss prognosis with the dizziness,diabetes mellitus,high blood pressure was worse.Conclusions It is considered that the age,prehospital delay time,type of hearing loss,degree of hearing loss,and whether with dizziness,high blood pressure,diabetes mellitus are related to the total effective rate.The prognosis of hearing loss can be estimated according to these correlation factors.