The child’s heartbeat accelerated by fever is considered to be a normal fever response, but may also be the emergence of acute myocarditis and other problems. 1. Normal fever response, the child fever heartbeat acceleration is generally a common situation, fever process due to the thermoregulatory center is affected, body temperature gradually rise, metabolic rate accelerated, oxygen consumption increased, so there will be a rapid heartbeat symptoms. 2. Acute myocarditis, part of the child fever heartbeat acceleration, may also be the emergence of acute myocarditis, produce acute myocarditis, myocardial function abnormality, may lead to heartbeat acceleration. Children with fever and rapid heartbeat, there may also be other reasons, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.