Welcome to SolidWorks forums Murali.
While you're making the models, you can decide which dimensions you need in the drawing. You can also right click a dimension and uncheck "mark for drawing".
You might also find this post helpful for your future reference.
Mr Deepak Gupta thks for ur reply ...ur methos is right.... but for complex models when am importing dimension for any one projection view or base view ...all marked dimensions are importing....how can i avoid this..