The Lobonchombiin cave is located in the mountain Aguit, of the Eastern Gobi of Mongolia, At lat. 42°35¢ 18.22¢¢ S, long 107°49¢31.16¢¢ E. The main passage is 49.9 mlong with an average width of 7.6m, mean height of 3.5 mand total volume of 1308.5m3. The Lobonchombiin cave consist two main passage. In the cave have many stalactite and stalagmites. This cave formed in carbonate rocks of the carbon-Permian aged and genesis of cave is horizontal karst cave system.