A field exploration on Ashikule Basin in the western Kunlun Mountains area was conducted. Through detailed field survey on geological and geomopholoical features of Ashikule volcano group, which is one of the volcanic plateaus at the highest altitude (about 5 000 m) in the world, the authors found out the total number of volcanoes, the eruption type and structural parameters, and the active history of the volcano group. The studies provided field evidences for resolving the controversies existing in the past.