Multiple trauma is a common critical disease in emergency department, and multiple trauma in children has its own clinical characteristics. Early identification, accurate diagnosis and correct evaluation are the keys to reduce the rate of disability and mortality. At present, there are many kinds of pediatric trauma scores，and more and more prediction models have been proposed, which can effectively judge the severity of the disease and predict the prognosis. In the selection of imaging method and timing, many factors should be considered, such as the state of the child, injury, accuracy and radiation. The continuous development of diagnostic imaging has improved the understanding of diseases and put forward higher requirements for doctors. Laboratory examination can also clearly diagnose and predict complications, but its timeliness and accessibility are uneven, and the cost may also need to be considered clinically. It is more appropriate to evaluate the children with multiple injuries by combining the two methods. With the deepening of research, the assessment of multiple trauma has been more sophisticated, but there are still certain limitations in children, leaving great development space.