儿童智力低下是儿童发育期(一般指18岁以下),因各种原因造成智力明显低于同龄儿童水平,同时伴有适应行为明显障碍,此病是最为严重危害儿童身心健康,影响民族素质的疾病之一,只有了解病因才能进行有效地预防和治疗,也为有关部门制定政策提供科学依据. Children’s mental retardation is the child’s developmental period (generally refers to the age of 18 years of age), due to various reasons, mental retardation was significantly lower than the same age children, accompanied by obvious obstacles to adaptive behavior, the disease is the most serious harm to children’s physical and mental health, affecting national qualities One of the diseases, only to understand the cause of the disease can be effectively prevented and treated, but also for the relevant departments to formulate policies to provide a scientific basis.