This study aims to discuss the efficacy between Pulmonary Vein Antral Isolation (PVAI) plus High Density Left Atrial Voltage Mapping (HDVM) and pulmonary vein isolation on Paroxysmal Atrial Fibrillation (PAF). A total of 60 patients with paroxysmal atrial fibrillation underwent radioablation in our department from January 2012 to January 2014; all cases were divided into two groups: 30 patients in group A (PVAI), 30 patients in group B (PVAI+HDVM). Atrial arrthymic data including atrial premature, atrial tachycardia, atrial flutter, and atrial fibrillation were collected by routine Electrocardiogram (ECG) and 24 h-Holter every month during 1-year post-operation follow-ups. Ablation recurrence was defined as any atrial arrthymic events (atrial tachycardia, atrial flutter, atrial fibrillation) persisting for more than 30 seconds by real-time ECG record and/or 24 h-Holter 3-month after ablation. 60 cases of PVAI were operated successfully. Low-Voltage Zones (LVZs) were located on right superior pulmonary vein outside antrum in 7 cases, right inferior pulmonary vein outside in 3 cases, left anterosuperior wall in 6 cases, left anteroinferior wall in 9 cases, roof in 3 cases, upperposterior wall in 2 cases. 1-year atrial fibrillation ablation success rate were at the same level (83.3% vs. 80.0%, P>0.05). No difference were found in 3-month atrial arrthymic recurrences between two groups statistically (43.1% vs. 40.7% at 1st month, 20.7% vs. 21.3% at 2nd month, 21.3% vs. 20.2% at 3rd month, P>0.05). Combination of pulmonary vein isolation with high density left atrial voltage mapping cannot improve ablation success rate of paroxysmal atrial fibrillation and increase the recurrence of atrial arrthymias.