last night some hacked my pvt key and steal all my eth and major eth tokens
can I secure my eth address or its now in control of hacker ?

you have to correct it before. Is there a mistake you made? because almost the average case of hack due to carelessness. so you have to reevaluate the chronology. or possibly other dns network you are attacked. that's mostly every case that happens
Correct mate, that is a very simple problem. If you can still access your account on Myetherwallet and if your token was there then quickly transfer into another wallet which is you fell safe to your private key. But if your token was already hacked then say bye bye, you can't be retrieved on it. Yes, carelessness makes us being a hack so we have our responsibility to keep our private key safe.
Avoid importing your main MEW account on the exchange, make it sure that the site of MEW is right.