Atrial fibrillation after radiofrequency ablation of atrial fibrillation, may be normal symptoms, pulmonary vein abnormalities, etc., should be taken medication, observation, and then decide whether to need to ablate again. Atrial fibrillation after radiofrequency ablation of atrial fibrillation belongs to the recurrence of the blanking period, the blanking period is defined as the time of three months after the operation, and its causes may be the pulmonary veins are not completely isolated, pulmonary vein conduction recovery, the existence of non-pulmonary vein triggering foci, and so on. It is recommended to observe the situation first, if the atrial fibrillation disappears by itself, it is a normal phenomenon and no treatment is needed; if the atrial fibrillation can not disappear by itself, you can take some AAD drugs such as amiodarone, propafenone, sotalol, etc., and the drugs usually need to be used for 1-3 months according to the instruction of the doctor; if the symptoms are more serious and the drugs are ineffective; radiofrequency ablation should be considered again. It is recommended to go to the hospital to find out the cause.