Sir if I get business visa for the first time what kind of document I need?

You need to prepare these materials including your passport and its copy, the application form, a passport-sized color photo, invitation letter of duly authorized unit, an invitation from your business partner, a covering letter from your company, recent 3-month bank statement and copy of business registration certificate.
The bank statement should be less than three pages of the local company bank statement and you should take the latest 3-month original one. Your sponsor bank statement may work, too.