Alzheimer’s disease susceptibility has the following factors: 1, advanced age, Alzheimer’s disease is an old age disease, easy to appear with age; 2, the level of education, low literacy level is more likely to appear; 3, risk factors of cerebrovascular disease, such as hypertension, diabetes, high blood lipids, smoking, obesity and other factors of vascular disease; 4, genetic factors, patient part of the susceptibility called Ap0E4, patients with this gene is particularly Patients with this gene are particularly susceptible to dementia; 5. Environmental factors, poisoning and other conditions can trigger the manifestation of dementia. There are some special jobs, nowadays it is popular to plant things, farmers do pesticides every day, factories that used to have exposure to heavy metals, air pollution, all these factors can lead to dementia in patients. Combined these factors, patients can be prone to dementia.