Im want to go Decathlon Daijoting sports store from near by LG tower in bejing, please guide me...

For the tower, do you refer to the one on Jianguomen Outer Street?
For the sport store, I think you refer to Decathlon Dajiaoting Sports Store?
If yes, it is highly recommended to go there by taking a taxi directly.
Or you can take the local subway line 1 to reach Sihui Station and then change a taxi to reach that store.