Is there a direct express bus service from shenyang to erlianhot(inner mongolia)& return,fare & schedule please.

I'm afraid not. For this journey, I suggest you take a plane to Huhhot first. At Hohhot Long-distance Bus Station, there are direct buses to Erlianhot. I remember the bus fare is around CNY65 per person. Buses between are scheduled at 08:00, 08:20, 08:50, 12:30 and 13:30. For the return journey, you can use the same way.