Abstract： Objective To investigate the clinic significance of the ventricular premature beats (VPBs).Methods Positioning analyses of the QRS wave pattern of the VPBs in 110 cases of patients (heart attackers and healthy heart patients) in hospital. Results For the cases of heart-attack patients, the VPBs occurred mostly in the left ventricle, taking up 25% of the totality. In 19% cases, the VPBs occurred in the right ventricle; in 15%cases,in the bottom of the heart;in 10% cases,on the tip of the heart;in 5.5% ,in both left and right ventricles,and the same rate in the posterior left ventricular wall. In addition, in 22 cases of patients with healthy heart, no dual-chamber ventricular premature beats happened. Conclusion It' s of great ECG diagnosis value and of great clinic significance to position where the VPBs of heart attackers occur.