Objective: To review the clinical results of three different methods in embolization of PDA. Methods: (1) Porstmann's Ivalon plugging method (2) Spring coil (3) Amplatzer ductus occluder. Results: The authors used Porstmann's method in 450 cases, Spring coil 30 cases and Amplatzer occluder 6 cases. All of them were successfully closed. Conclusions: Porstmann's method are relatively complicated, but all the equipment can be made domestically. Spring coil method is only used limitedly in small ductus, Amplatzer occluder is simple with no limitation for age and size of ductus but is expensive.