to investigate therapeutic effects of Blood Nourishing Brain Arousing Granule on cognitive function and capacity for senile dementia patients (SD).Methods:120 cases of SD were randomly divided into treated group to take the granule and control group without given any medication. Score all patients according to MMSE and ADL systems before and after 3 as well as 6 months of treatment.Results:The treated group responded well to the granule in terms of cognitive function and capacity (P<0.05).Conclusion:Blood Nourishing Brain Arousing Granule significantly improved cognitive function and capacity for senile dementia patients.