i need a work visa (z) so what all documents needed,please help me regarding this

Sanoop, the required documents can be as follows:
1. Your passport and copy of its data page
2. The application form with a passport-style photo attached
3. Alien employment permit and invitation letter of a duly authorized unit (your employer will get you these two documents).
And then submit your application to the CVASC to apply for it.