Early symptoms of Alzheimer’s disease are usually 1-3 years old and are mainly characterized by a large forgetfulness. 1, its specific symptoms are: near event amnesia, most notably memory impairment, manifested as forgetfulness of recent events. 2, with the development of the disease, patients gradually forget past events, in severe cases, they do not recognize their relatives or even themselves; orientation disorders, confusion in the perception of time, often do not know where they are, often lost because they can not find the way home; expression disorders, speech is not fluent, ambiguous and slow, often forget some words, can not exactly indicate their thoughts and wishes, while personality changes, sensitive and suspicious, manifested as emotional The personality changes, sensitivity and suspicion, showing emotional instability, moodiness and unpredictability; the calculation power decreases, showing behavioral disorders, wandering around and making noises. 3.Decrease in understanding and judgment, manifested by the inability to understand the surrounding things correctly, directly affecting the reasoning and judgment of things. 4.Alzheimer’s disease is a very harmful mental illness of the elderly, and there is no cure for it yet. 5. The progress of Alzheimer’s disease is generally slow, and usually the patient can still have normal interactions at the beginning, so it is easier to be ignored by family members. When the above symptoms appear, family members should be alert, and must go to medical institutions to develop a personalized treatment plan for comprehensive treatment, in order to achieve early detection, early diagnosis and early treatment.