Sure, watching movies helps to improve you English. There're also some other ways: Listening to music, reading news on BBC or VOA website (don't worry, they speak slowly for us), and also: ask + answer question on this website :) If you want to improve your listening skill by watching movies, I recommend you to install a player that can display two languages (on the top and bottom screen): The KMPlayer.

thanks , i'll try it

Also, try singing karaoke songs in English. Hearing the words help you and it's a great time likewise! Good luck!