Abstract: The unique “ten thousand ice cave” in Ningwu,Shanxi Province has the largest scale of the ice body preserved in the vertical cave with the most quantity and beauty except the global frozen soil zonal at present. In order to determine the shape, size and 3D distribution of this “ten thousand ice cave”,EH4 electromagnetic image system is used to maseaure sysmatically. The results of geophysical prospecting showed this ice cave extends about 25 m and 20 m in NS and EW direction respectively, and extends in NE direction locally.This cave distributes in the polar shape with 85 m deep. In the general,this “ten thousand ice cave” has the features of a smaller entry and a bigger middle part. The formation and retention of the ten thousand ice cave is the epitome, the true record and the witness of the same area climatic and environmental variation,which provides valuable practice evidence to deeply study the climatic and environmental change in this area and North China.

Key words: Ningwu area of Shanxi, ten thousand ice cave, geophysical prospecting survey, morphological characteristics