Inclusion Criteria:  1. Age between 18 and 80 years old; 2. Persistent AF（lasting no more than 3 years）after catheter ablation; 3. No acupuncture treatment within the previous 6 months.  Exclusion Criteria:  1. A history of allergy to acupuncture or amiodarone; 2. Severe heart failure (New York Heart Association（NYHA）class III or IV); 3. Echocardiographic parameters: left ventricular ejection fraction < 40%, left atrium diameter > 5.0cm; 4. Severe lung, liver, kidney disease or other serious primary diseases; 5. Skin allergy to ECG monitoring electrode patch. 6. The estimated life expectancy of < 1 year.