Relation between field of two webform I have created two webform as Vendor and Sponsors.There is two sponsorship type as gold and platinum in sponsors and each vendor is sponsors. Now i want to show in Vendor view the type of sponsorship this vendor have. Both are separate modules. I am not able to understand how to do this.
As far as I know you can not reference a webform submission from another webform. The functionality you describe is needed here is something I recommend using standard Drupal content types for.

Create a content type called Vendor and another one called Sponsor. Use the module Entity reference to create a field that describes the reference between the content types.

Webforms are great for simple forms, surveys etc but not in this use case.