Abstract: An early warning system of sudden cardiac death based on the Internet electrocardiograph and intelligent platform is designed to detect the signal of sudden cardiac death in time and save lives. The system is mainly composed of four parts: Internet electrocardiograph, mobile terminal, intelligent platform and 120 emergency center. It has been verified that the sudden cardiac death early warning system is reliable, suitable for remote electrocardiogram monitoring, and can provide diagnosis and early warning for people at risk of sudden cardiac death. The system realizes the miniaturization of ECG monitoring equipment, and has the advantages of intelligent diagnosis and rapid warning, and can be applied to the pre-hospital monitoring of high-risk groups of sudden cardiac death and has a good application value.