Children with developmental delay should undergo rehabilitation intervention as early as possible in order to maximize the recovery of their functions. Developmental delay, also known as growth retardation, refers to the abnormal phenomenon of children slowing down in the process of growth and development, including backward speech development, backward motor development, backward physical development, backward intellectual development, backward mental development and so on. Various unfavorable factors in daily life may affect the development to different degrees, thus causing growth retardation in children. For children with delayed physical development, appropriate treatment should be carried out according to the cause of the disease. If the child’s development is delayed due to malnutrition, the child’s diet should be balanced comprehensively to improve the malnutrition. At the same time, according to the specific situation, we should adopt appropriate rehabilitation training, such as appropriate aerobic exercise (jogging, swimming, etc.), jumping rope and other training, to promote the development of motor function. For children with delayed language development, language rehabilitation training, such as pronunciation exercises, is provided to encourage them to express their needs verbally. Clinical doctors will formulate individualized treatment plans according to the actual cases in order to strive for the greatest possible improvement of the abnormal situation. Patients with developmental delay need to seek timely medical treatment and rehabilitation training under the guidance of their doctors to promote functional recovery and improve their quality of life.