Can anyone help me to get the Tack pad drivers for windows 7 on mAcBook Air..

If you've created the Windows 7 Drivers CD/USB drive, using Boot Camp Assistant in OSX, the drivers should be on there. My MacBook Pro (2010) touchpad works fine with those drivers installed, and I think it's identical to the Air's.

http://support.apple.com/kb/HT4407 for info on how to create this drive.