To observe the effect of Naoxintong Capsule in the treatment of chronic cerebral circulation insufficiency. Methods:One hundred patients suffering from chronic cerebral circulation insufficiency were randomly divided into treatment group and control group with 50 cases in each group. Patients in both groups were given the same basic treatment， and treatment group provided extra oral administration of Naoxintong capsule with 1.6grams each time， three times a day. After one month of treatment， dizziness， insomnia， headache symptoms， hemorheology， and transcranial Doppler ultrasonography of patients were observed. Results:After one month of treatment， symptoms and objective examination showed more significant improvement in patients in treatment group that that of control group (P<0.05). Conclusion: Naoxintong capsule has good curative effect on patients with chronic cerebral insufficiency.