Can anybody give circuit of isolation amplifier using optocoupler and op amp​

 

Well, optocouplers generally aren't very linear - they're either ON, or struggling to turn off. This isn't exactly the case, but once you've fiddled around with optocouplers/optoisolators for awhile you will find that the turn-off time can seem to be an eternity.

If it's an option, convert the analog data to digital, and then send it through an optocoupler/optoisolator. You'll eliminate many problems by doing that.

 

Can anybody give circuit of isolation amplifier using optocoupler and op amp​

You could use a IL300. http://www.vishay.com/optocouplers/list/product-83622/

App note: http://www.vishay.com/docs/83708/appn50.pdf