Research results: The study showed that in the group of atrial fibrillation in WPW syndrome: common age was 49.2 ± 15.6 years old, male accounted for a high rate of 83.3%, cardiovascular disease group was associated with hypertension, functional Sinus node function and intracardiac conduction were normal, the refractory time of the accessory pathway was short, forward 247.7 ± 29.0, retrograde 279.0 ± 24.0 P<0.05.