The tomb is in a cluster in the desert near Ordos City, where archaeologists also unearthed two skulls in a decayed sarcophagus, as well as pieces from pottery and bronze utensils, Gao Xingchao, a researcher with Ordos city museum said.
The mural, on the walls and extending on to the ceiling of a vault, covers more than 30 square metres.
More than 10 pictures tell the life story of the tomb's occupants, as they travel, feast and take care of their livestock, state-run Xinhua news agency reported.
The patterns were painted with mineral colours on a white background.
According to Gao, identity of the tomb owners is not known yet due to the scarcity of relics recovered, but the tomb, discovered last September, was completed in the East Han Dynasty (24 - 220 AD), the report said.