I wanna go to world park from capital airport by subway wich station close to world park

There is no near subway station to Beijing World Park. If you prefer subway, the nearest station would be Wukesong station, but you still have to take a taxi or bus from Wukesong to World park.
I advise you you take the airport express to Dongzhimen, transfer to Beijing Subway line 2 (inner-loop) to Chongwenmen, transfer to bus no. 692 to world park.