Abstract： Objective： To observe the clinical effect of modified Banxia Baizhu Tianma Decoction combined with vestibular rehabilitation training for chronic subjective dizziness (CSD) with phlegm-damp obstruction syndrome. Methods： A total of 60 cases of CSD patients with phlegm-damp obstruction syndrome were selected and divided into the control group and the observation group according to the random number table method， with 30 cases in each group. The control group was given vestibular rehabilitation training， and the observation group was additionally treated with modified Banxia Baizhu Tianma Decoction based on the treatment of the control group. Both groups were treated for four weeks. The clinical effects， traditional Chinese medicine (TCM) syndrome scores， Dizziness Handicap Inventory (DHI) scores，Hamilton Anxiety Scale (HAMA) scores，Pittsburgh Sleep Quality Index Scale (PSQI) scores and the incidence of adverse reactions were compared between the two groups. Results：After treatment， the total effective rate was 93.33% in the observation group， higher than that of 73.33% in the control group， the difference being significant (P＜0.05). The TCM syndrome scores in the two groups were decreased when compared with those before treatment，and the TCM syndrome score in the observation group was lower than that in the control group，differences being significant (P＜0.05). The scores of DHI， HAMA and PSQI in the two groups were decreased when compared with those before treatment，and the above three scores in the observation group were lower than those in the control group，differences being significant (P＜0.05). During the treatment period， the incidence of adverse reactions was 3.33% in the observation group，and when compared with that of 6.67% in the control group，there was no significant difference (P＞0.05). Conclusion： Modified Banxia Baizhu Tianma Decoction combined with vestibular rehabilitation training has a significant curative effect on CSD with phlegm-damp obstruction syndrome， which can effectively relieve the vertigo degree and anxiety of patients and improve their sleep quality，with high safety.