how can i remove my iwatch from Activation lock

And if you are not the original owner then;

The person that you bought/got this watch from needs to follow all the steps on this page;

Remove the Activation Lock so that the buyer can use it.

If they can't or won't then get your money back or recycle the watch and mark it down as a bad experience.

Did you read the information in the Related Article? You need the Apple ID and password used to activate it. About Activation Lock on your Apple Watch - Apple Support