With the increasing awareness of requirements on the information security and reliability,biometric identification becomes an important research topic in the domain of information security. However,due to the traditional biometric technologies encounter falsification in recent years,personal identification using electrocardiograms (ECG) become a new hot research field. Its research methods range from complex to simple since the ECG signal used as a new biometric. This paper summarizes the history,current situation and application of ECG biometric identification. It is feasible to identify person by ECG and has its unique advantages of high security,yet there is still a distance to be widely used in practice.