There is no certainty of a very effective or curative method. Drugs for the treatment of AD are mainly divided into two categories; 1. Drugs that increase cholinergic nerve function in the brain, mainly cholinesterase inhibitors and M-choline receptor agonists. For example, only two drugs approved by the US FDA for the treatment of AD, namely tacrine approved in September 1993 and donepezil approved in March 1997, are cholinesterase inhibitors. 2. Cytoprotective agents acting on the neurotransmission system to slow down the degeneration process of brain neurons, theoretically, blocking the formation of beta-amyloid protein (ABP), inhibiting the neurotoxicity of ABP and protecting or repairing neurons for the purpose of preventing and treating AD. Other: ①Aluminum chelating agent, such as deferoxamine, can reduce the absorption of aluminum and brain tissue aluminum concentration, well-tolerated, there is some clinical and experimental evidence. ② Non-steroidal (NSAIDS) and steroidal anti-inflammatory drugs have a mitigating effect on the condition of some patients and are one of the candidate treatment strategies. ③Application of sex hormones. Proponents believe that estrogen replacement therapy after menopause in older women has a role in dementia in older women. ④Improve brain metabolism drugs: for example, Ginkgo biloba extract can improve neuronal metabolism and have a positive effect on neurotransmitters; a large amount of brain rejuvenation can slow down the progression of AD patients and improve naming and distant memory. ⑤ Calcium antagonists: such as nimodipine, etc. Recent studies have shown that cell still overload and imbalance of calcium homeostasis caused by various reasons are the final general pathway of cell death. ⑥Gene therapy; the use of recombinant technology to replace the defective gene with a normal gene in order to eradicate the gene defect is not yet possible. Input of exogenous nerve growth factor can effectively prevent damage to the central cholinergic nervous system, and learning and memory of animals improve; the first case of treating AD with nerve growth factor has been reported; 1 month after intracerebral injection, memory of series of words improved, but no change in other cognitive functions. (7) Chinese herbal medicine treatment: the application of angelica paeoniae san, hooked vine san and Huanglian detoxification soup were studied from the perspectives of depression, wind, heat and toxicity, and were considered to have some efficacy in improving learning and memory in AD.