The particularly poor memory of a 6-year-old child is usually related to physiological factors such as sleep deprivation and malnutrition; or it may be caused by pathological factors such as the occurrence of lead poisoning and abnormal brain development. 1. Physiological factors: such as too little sleep, insufficient sleep, malnutrition, etc., may affect the memory, resulting in memory loss. 2. Lead poisoning: such as living in an environment with lead for a long time, it is easy to cause lead poisoning, leading to memory loss, and in serious cases, it can cause abdominal cramps, anemia, and so on. 3. Abnormal brain development: for example, cerebral ischemia or cerebral hypoxia in infancy will easily affect the normal development of the brain, which will have an impact on intelligence and memory. 6-year-old child memory is particularly poor, there may be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.