Abstract: The proposed automatic ECG analysis software,executed in SDJ-1 computer,recognizes 34 ECG parameters of each of 12 leads,and gives 64 different diagnosis of abnormal ECG findings in the regular rhythms.A compensation circuit is specially designed to reduce the difference between computer and human doctor diagnosis Programs for ECG wave slope and area measurements are also incorporated to acquire more ECG information.A software model of ECG is proposed for ECG analysis program verification.Test run results show that the software functions well and is good for clinical diagnosis.