Larry King moving back home...

Larry King is done sleeping alone -- CNN's most notorious playboy is moving back in with his wife Shawn Southwick ... well at least for now.

King is allegedly checking out of the hotel where he's been staying and heading back into the couple's Beverly Hills mansion ... to give the whole "living together" thing another test run.

Both sides have agreed to a one-week trial ... but it could go longer if things go well.

Of course this is the third time Larry and Shawn extended their deadline for moving forward with the divorce and they must really love the kids to put with each other’s crap