@Anilkumark3888  Here is what I would suggest;

1. Create a template file with your defined bookmarks. You can use this to populate from your Excel file.
   • You would read your Excel file using the normal means to extract whatever data you wanted to go into each bookmark.
2. To be safe, I might attach this file to the deployment package or place it in a known location and copy it before opening, so I always had a clean copy of the template.
3. Save this as a new file so you don't overwrite your template.
4. When you want to add this to a new page in your "output" file, you can use a second Word connector and the technique outlined here to merge your template file into the "output" file.

This would use as much off-the-shelf connector capabilities as possible. The technique in item 4 is well-explained by Jeff in the link provided, but let me know if this makes sense.