Pharmaceutical composition for the treatment of dementia and preparation method thereof

The invention provides a pharmaceutical composition for the treatment of dementia and a preparation method thereof. The pharmaceutical composition comprises bilobalide and one or two or a combination of ginkgolide A and ginkgolide C. The pharmaceutical composition containing bilobalide provided by the invention has a neuroprotective effect in many aspects, including promoting nerve growth, improving the memory function of the elderly and preventing the occurrence of dementia, etc. Experiments show that the product has certain role to improve memory impairment in mice in the treatment of Alzheimer's disease.