Whether infectious pneumonia in children is serious or not cannot be generalized, mainly related to the clinical manifestations of the child, whether there are complications, whether there is drug resistance and other factors. If the child itself is in good health, suffering from contagious pneumonia, in the early stages of the disease, the child is only coughing, fever and other minor symptoms, timely cooperation with the doctor to carry out scientific standardized treatment, so that the disease has been effectively controlled, and did not give rise to complications; this kind of children’s contagious pneumonia is not serious. If the child’s own immunity is poor, suffering from contagious pneumonia, in the early stage of the disease did not timely treatment, resulting in the disease did not get timely and effective control, the emergence of severe cough and high fever and other symptoms, and along with the gradual progression of the disease, resulting in acute respiratory distress syndrome, acute kidney injury, acute heart failure and other complications, this type of children’s contagious pneumonia is quite serious. Therefore, pediatric infectious pneumonia should be detected as early as possible, go to a regular hospital as early as possible, and cooperate with doctors for timely treatment to prevent delays.