Motor delay in children is also known as psychomotor delay. It is characterized by motor development that lags behind that of normal infants, such as not being able to hold their head up at 3 months, not being able to roll over at 6 months, and not being able to grasp things with their hands. The prognosis for this period of delayed motor development can be normal, but it is more often the early manifestation of diseases such as cerebral palsy and mental retardation. Some of the following conditions should be brought to our attention 1. Body tenderness and reduced spontaneous movements, which are symptoms of hypotonia, can be seen at one month. If it persists for more than 4 months, we should pay attention to the occurrence of severe brain injury, mental retardation or muscular system diseases. 2.Hardness of the body: this is a symptom of hypertonia, which can be seen at one month. If it persists for more than 4 months, the occurrence of cerebral palsy should be noted. 3. Delayed reflection and unresponsiveness to name calling, which is an early manifestation of mental retardation. 4. Abnormal head circumference: head circumference is an objective indicator of morphological development of the brain, and children with brain injury often have abnormal head circumference. 5, poor weight gain, nursing weakness. 6.Fixed posture, often due to abnormal muscle tone as a result of brain injury, such as coracoacusis, frog position, inverted U-shaped posture, etc. 7, strabismus: 3-4 months old infants with strabismus and poor eye movement can indicate the presence of brain injury. 8.Body twisting: 3-4 months old infants with body twisting often suggest extraconal injury. 9, hand clenching. If the hand is still unable to open at 4 months of age, or the thumb is not able to retract internally, especially if one upper extremity is present, it has important diagnostic implications and the occurrence of hemiplegia should be noted. Inability to reach out and grasp objects: If you cannot reach out and grasp objects at 4-5 months of age, be aware of the possibility of mental retardation or cerebral palsy. 10. Head instability: If a 4-month-old baby cannot lift his head or cannot hold his head upright when sitting, it is often an important sign of brain damage. 11.Non-smiling: If an infant cannot smile at 2 months or laugh aloud at 4 months, the occurrence of mental retardation should be noted 12.Strabismus: When an infant at 3-4 months has strabismus and poor eye movement, it can indicate the presence of brain injury. 13.Gaze hand: It is still present after 6 months of age and needs attention. In addition, children with motor delays may also have abnormalities in intelligence, language, and social skills. It is often not easy to detect the delayed motor development in infants, and the critical treatment time is missed. The presence of the above-mentioned manifestations in children within 6 months of age should be brought to the attention of parents, especially children with high risk factors for cerebral palsy (the high risk factors for cerebral palsy were mentioned earlier). If needed, they should receive early intervention for children at risk to buy time for their children’s future.