Cranial ultrasound considerations are: the working environment, the child to be scanned need to maintain a quiet state, the doctor’s operation should be gentle, to avoid excessive pressure, damage to the child’s brain. In addition, attention should be paid to the environment of the scanning, the scanning of children with thick hair need to do skin preparation treatment. Pay attention to infection control, the scanning probe should be kept clean, and the infected children need to disinfect the probe to avoid cross-infection. Cranial ultrasonography is best performed in a fixed clinic and at the bedside to avoid fluctuations in blood pressure and intracranial hemorrhage in the child.