Hi Hamed,
The phrase "would you mind..." is a way to make a polite request. It's basically a short way to say, "If it's not inconvenient, would you please...."
When you use "would you mind..." always use the "-ing" form of the verb that you want to person to do. For example:
Would you mind passing the salt?
Would you mind holding the door?
Would you mind repeating that last bit?
I hope this helps!