The precautions for lacunar cerebral infarction are particularly important for the process of disease detection, treatment, and prevention: 1. Diet is mainly light, because most of lacunar cerebral infarction is caused by cardiovascular diseases, so patients will need to eat a light diet, and eat more vegetables and fruits, such as dragon fruit, which has the effect of lowering blood lipids and blood pressure; 2. Patients with lacunar cerebral infarction in the rehabilitation phase should be under the doctor’s orders for proper rehabilitation exercise, avoid long-term bed rest, resulting in secondary changes of muscles and nerves, such as muscle atrophy, joint contracture, etc., which bring difficulties to rehabilitation. At the same time, we should also avoid random practice and excessive exercise to avoid sequelae such as upper limb basket and lower limb circle walk. Therefore, scientific, reasonable and timely rehabilitation treatment, in order to fully enhance the effectiveness of rehabilitation; 3, when the sudden change in temperature, air pressure and temperature changes significantly, the middle-aged and elderly, especially the weak and sickly, most of them do not adapt to the disease, especially in the cold and summer, the elderly have poor adaptive capacity, lower immunity, morbidity and mortality are higher than usual, so we should be especially careful.